[Matplotlib-users] Smooth contourplots
Hi, I am writing a program that reads three columns (one column containing the weights, the other two containing the values I want to plot) from a file containing the results from a MonteCarlo Markov Chain. The file contains thousends of lines. Then create the 2D histogram and make contourplots. Here is a sample of the code (I don't know if is correct, it's just to show what I do) import numpy as np import matplotlib.pyplot as mplp chain = np.loadtxt(chain.txt, usecols=[0,4,6]) #read columns 0 (the weights), 4 and 6 (the data), from the file chain.txt h2D, xe, ye = np.histogram2D(chain[:,1],chain[:,2], weights=chain[:,0]) #create the 2D histogram x = (xe[:-1] + xe[1:])/2. #x and y values for the plot (I use the mean of each bin) y = (ye[:-1] + ye[1:])/2. mplp.figure() #open the figure mplp.contourf(x, y, h2D.T, origin='lower') #contour plot As it is the contours are not smooth and they look not that nice. After days of searches I've found three methods and tried, unsuccesfully, to apply them 1) 2d interpolation: I got segmentation fault (on a quadcore machine with 8Gb of RAM) 2) Rbf (radial basis functions): I got wrong contours 3) ndimage: it creates spurious features (like secondary peaks parallel to the direction of the main one) Before beginning with Python, I used to use IDL to plot, and there is a function 'smooth' that smooth for you 2D histograms. I haven't found anything similar for Python. Does anyone have an idea or suggestion on how to do it? Thank in advance Francesco -- View this message in context: http://old.nabble.com/Smooth-contourplots-tp29253884p29253884.html Sent from the matplotlib - users mailing list archive at Nabble.com. -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Matplotlib-users Digest, Vol 50, Issue 37
Hello all, I need to format the values of graphic to KHz.my values are in Hz see at idle python it displays the values as: 3000 3050 3100 3400 , but I need to go where it will be displayed KHz: 3.0 3.1 can someone help me? On Thu, Jul 15, 2010 at 10:48 AM, matplotlib-users-requ...@lists.sourceforge.net wrote: Send Matplotlib-users mailing list submissions to matplotlib-users@lists.sourceforge.net To subscribe or unsubscribe via the World Wide Web, visit https://lists.sourceforge.net/lists/listinfo/matplotlib-users or, via email, send a message with subject or body 'help' to matplotlib-users-requ...@lists.sourceforge.net You can reach the person managing the list at matplotlib-users-ow...@lists.sourceforge.net When replying, please edit your Subject line so it is more specific than Re: Contents of Matplotlib-users digest... Today's Topics: 1. scientific notation (Wal?ria Antunes David) -- Message: 1 Date: Thu, 15 Jul 2010 10:41:52 -0300 From: Wal?ria Antunes David waleriantu...@gmail.com Subject: [Matplotlib-users] scientific notation To: matplotlib-users@lists.sourceforge.net Message-ID: aanlktimgokwxnsavxwym9ycvkvhmfpbky4fxv10_y...@mail.gmail.com Content-Type: text/plain; charset=iso-8859-1 Hi all, I have a code base so that: from pylab import * x = arange (3000,3400) y = -108 * (3.0e14 ** 2)/x**2 pylab..title(Teste) pylab.savefig(imagem.png) plot(x, y) Well the values of the function range(3000,3400) are in Hz..i need to pass GHz which would be in scientific notation as follows bellow: 3000 Hz = 3,0 ? 10-6 GHz 3400 Hz = 3,4 x 10-6 Ghz How do I make the graph x-axis is shown in figures scientific notation, for this currently so 3000,3050,3100,,3400 in scientific notation is: (3.0e-6, 3.4e-6) Can someone help me? See my attachment I need to show this values in scientific notation.. Wal?ria -- next part -- An HTML attachment was scrubbed... -- next part -- A non-text attachment was scrubbed... Name: current_image.jpg Type: image/jpeg Size: 35656 bytes Desc: not available -- -- This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users End of Matplotlib-users Digest, Vol 50, Issue 37 -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Documentation error/bug?
Hello, I looked on your website for the different line styles. In the documentation for matplotlib.lines.line2D.set_linestyle, the dashed linestyle is listed as '-' and not '--'. It it my understanding that dashed should be '--'. If I'm incorrect, sorry for the noise. Cheers, -- Josh Lawrence Ph.D. Student Clemson University -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Import matplotlib.pyplot fails on windows XP
Hello, I've installed the following Python packages on a Windows XP machine: Python 2.6.5 Python 2.6 numpy-1.4.1 Python 2.6 matplotlib-0.99.3 [installer - matplotlib-0.99.3.win32-py2.6] Python and Numpy work correctly. Matplotlib also works and as a test I tried successfully the following on the python interpretor: from matplotlib.pyplot import * plot([1,2,3]) show() A graph then appears and thus so far so good. However, when I try to run a certain python script, a problem occurs when importing from matplotlib: Traceback (most recent call last): File C:\Pythoncode\Games\Bridge_war_2\unitload2.py, line 2, in module from matplotlib.pyplot import plot, ylabel,xlabel, show File C:\Python26\lib\site-packages\matplotlib\pyplot.py, line 78, in module new_figure_manager, draw_if_interactive, show = pylab_setup() File C:\Python26\lib\site-packages\matplotlib\backends\__init__.py, line 25, in pylab_setup globals(),locals(),[backend_name]) File C:\Python26\lib\site-packages\matplotlib\backends\backend_tkagg.py, line 7, in module import Tkinter as Tk, FileDialog File C:\Python26\lib\lib-tk\FileDialog.py, line 12, in module from Dialog import Dialog File C:\Pythoncode\Games\Bridge_war_2\Dialog.py, line 2, in module import wx ImportError: No module named wx And then no graph appears. The same script works fine on my Linux computers. On the unitload2.py script, the following is imported: from numpy import array, append, .. from numpy.linalg import solve No further modules are imported. Once I've ran the unitload2.py script, that session of the python interpretor produces the same error when I try a test plot again. Regards Alex _ http://clk.atdmt.com/UKM/go/19780/direct/01/ Do you have a story that started on Hotmail? Tell us now-- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Import matplotlib.pyplot fails on windows XP
On Sat, Jul 24, 2010 at 4:57 AM, eck naysmith ecker...@hotmail.com wrote: Hello, I've installed the following Python packages on a Windows XP machine: Python 2.6.5 Python 2.6 numpy-1.4.1 Python 2.6 matplotlib-0.99.3 [installer - matplotlib-0.99.3.win32-py2.6] Python and Numpy work correctly. Matplotlib also works and as a test I tried successfully the following on the python interpretor: from matplotlib.pyplot import * plot([1,2,3]) show() A graph then appears and thus so far so good. However, when I try to run a certain python script, a problem occurs when importing from matplotlib: Traceback (most recent call last): File C:\Pythoncode\Games\Bridge_war_2\unitload2.py, line 2, in module from matplotlib.pyplot import plot, ylabel,xlabel, show File C:\Python26\lib\site-packages\matplotlib\pyplot.py, line 78, in module new_figure_manager, draw_if_interactive, show = pylab_setup() File C:\Python26\lib\site-packages\matplotlib\backends\__init__.py, line 25, in pylab_setup globals(),locals(),[backend_name]) File C:\Python26\lib\site-packages\matplotlib\backends\backend_tkagg.py, line 7, in module import Tkinter as Tk, FileDialog File C:\Python26\lib\lib-tk\FileDialog.py, line 12, in module from Dialog import Dialog File C:\Pythoncode\Games\Bridge_war_2\Dialog.py, line 2, in module import wx ImportError: No module named wx The error is that your Windows XP box does not have the wxPython module installed for Windows. http://www.wxpython.org/download.php I hope that helps, Ben Root -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Documentation error/bug?
On Sat, Jul 24, 2010 at 1:51 PM, Josh Lawrence josh.k.lawre...@gmail.comwrote: Hello, I looked on your website for the different line styles. In the documentation for matplotlib.lines.line2D.set_linestyle, the dashed linestyle is listed as '-' and not '--'. It it my understanding that dashed should be '--'. If I'm incorrect, sorry for the noise. Cheers, -- Josh Lawrence Ph.D. Student Clemson University Looks like the formatter for the online documentation took the double-dash to mean a long line, much like how LaTeX does. Anybody know how to make the double-dash appear as two distinct dashes? http://matplotlib.sourceforge.net/api/artist_api.html?highlight=set_linestyle#matplotlib.lines.Line2D.set_linestyle Ben Root -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] imshow and projection axes
Hi, thank you for your quick answers which pointed me to a solution: setting clip_on=False solves the problem: pylab.imshow(d, extent=(-pi,pi,-pi/2,pi/2), clip_on=False) However, for me it feels not very intuitive to write clip_on=False to activate the desired clipping. Tobias signature.asc Description: This is a digitally signed message part. -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Hz to KHz
Hello all, I need to format the values of graphic to KHz.my values are in Hz see at idle python it displays the values as: 3000 3050 3100 3400 , but I need to go where it will be displayed KHz: 3.0 3.1 can someone help me? -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Hz to KHz
Hi, You may just divide them by 1000? Matthieu 2010/7/26 Waléria Antunes David waleriantu...@gmail.com: Hello all, I need to format the values of graphic to KHz.my values are in Hz see at idle python it displays the values as: 3000 3050 3100 3400 , but I need to go where it will be displayed KHz: 3.0 3.1 can someone help me? -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Information System Engineer, Ph.D. Blog: http://matt.eifelle.com LinkedIn: http://www.linkedin.com/in/matthieubrucher -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Hz to KHz
I know...I tried but I'm using django and also when divided by 1000 the image does not appear... I don't know what to do.help me On Mon, Jul 26, 2010 at 1:27 PM, Matthieu Brucher matthieu.bruc...@gmail.com wrote: Hi, You may just divide them by 1000? Matthieu 2010/7/26 Waléria Antunes David waleriantu...@gmail.com: Hello all, I need to format the values of graphic to KHz.my values are in Hz see at idle python it displays the values as: 3000 3050 3100 3400 , but I need to go where it will be displayed KHz: 3.0 3.1 can someone help me? -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Information System Engineer, Ph.D. Blog: http://matt.eifelle.com LinkedIn: http://www.linkedin.com/in/matthieubrucher -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Smooth contourplots
It sounds like you're wanting a gaussian kernel density estimate (KDE) (not
the desktop!). The other options you mentioned are for interpolation, and
are not at all what you're wanting to do.
You can use
scipy.stats.kde.gaussian_kde()http://www.scipy.org/doc/api_docs/SciPy.stats.kde.gaussian_kde.html.
However, it currently doesn't take a weights array, so you'll need to modify
it for your use case.
If you prefer, I have faster version of a gaussian KDE that can take a
weights array. It's actually slower than the scipy's gaussian kde for a low
number of points, but for hundreds, thousands, or millions of points, it's
several orders of magnitude faster. (Though the speedup depends on the
covariance of the points... higher covariance = slower, generally speaking)
Here's a quick pastebin of the code. http://pastebin.com/LNdYCZgw
To use it, you do something like the below... (assuming the code in the
pastebin is saved in a file called fast_kde.py)
import numpy as np
import matplotlib.pyplot as plt
from fast_kde import fast_kde
# From your description of your data...
weights, x, y = np.loadtxt('chain.txt', usecols=(0,4,6)).T
kde_grid = fast_kde(x, y, gridsize=(200,200), weights=weights)
# Plot the grid
plt.figure()
plt.imshow(kde_grid, extent=(x.min(), x.max(), y.max(), y.min())
# Reverse the y-axis
plt.gca().invert_yaxis()
plt.show()
Hope that helps a bit,
-Joe
On Sat, Jul 24, 2010 at 3:56 AM, montefra franz.berges...@googlemail.comwrote:
Hi,
I am writing a program that reads three columns (one column containing the
weights, the other two containing the values I want to plot) from a file
containing the results from a MonteCarlo Markov Chain. The file contains
thousends of lines. Then create the 2D histogram and make contourplots.
Here
is a sample of the code (I don't know if is correct, it's just to show what
I do)
import numpy as np
import matplotlib.pyplot as mplp
chain = np.loadtxt(chain.txt, usecols=[0,4,6]) #read columns 0 (the
weights), 4 and 6 (the data), from the file chain.txt
h2D, xe, ye = np.histogram2D(chain[:,1],chain[:,2], weights=chain[:,0])
#create the 2D histogram
x = (xe[:-1] + xe[1:])/2. #x and y values for the plot (I use the mean
of each bin)
y = (ye[:-1] + ye[1:])/2.
mplp.figure() #open the figure
mplp.contourf(x, y, h2D.T, origin='lower') #contour plot
As it is the contours are not smooth and they look not that nice. After
days
of searches I've found three methods and tried, unsuccesfully, to apply
them
1) 2d interpolation: I got segmentation fault (on a quadcore machine with
8Gb of RAM)
2) Rbf (radial basis functions): I got wrong contours
3) ndimage: it creates spurious features (like secondary peaks parallel to
the direction of the main one)
Before beginning with Python, I used to use IDL to plot, and there is a
function 'smooth' that smooth for you 2D histograms. I haven't found
anything similar for Python.
Does anyone have an idea or suggestion on how to do it?
Thank in advance
Francesco
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Re: [Matplotlib-users] Hz to KHz
My code like this in django: http://pastebin.com/nzM5jvuc i'm lost On Mon, Jul 26, 2010 at 1:42 PM, phob...@geosyntec.com wrote: Make sure that you’re dividing by 1000.0 (as opposed to 1000) to avoid any integer nonsense and make sure to reset your axis limits. Posting a small code snippet would help us get you on the right track. -p *From:* Waléria Antunes David [mailto:waleriantu...@gmail.com] *Sent:* Monday, July 26, 2010 9:32 AM *To:* Matthieu Brucher *Cc:* matplotlib-users@lists.sourceforge.net *Subject:* Re: [Matplotlib-users] Hz to KHz I know...I tried but I'm using django and also when divided by 1000 the image does not appear... I don't know what to do.help me On Mon, Jul 26, 2010 at 1:27 PM, Matthieu Brucher matthieu.bruc...@gmail.com wrote: Hi, You may just divide them by 1000? Matthieu 2010/7/26 Waléria Antunes David waleriantu...@gmail.com: Hello all, I need to format the values of graphic to KHz.my values are in Hz see at idle python it displays the values as: 3000 3050 3100 3400 , but I need to go where it will be displayed KHz: 3.0 3.1 can someone help me? -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Information System Engineer, Ph.D. Blog: http://matt.eifelle.com LinkedIn: http://www.linkedin.com/in/matthieubrucher -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Hz to KHz
On 26 July 2010 12:47, Waléria Antunes David waleriantu...@gmail.com wrote: My code like this in django: http://pastebin.com/nzM5jvuc Are you perhaps suffering from integer division? How about dividing by 1000.0, instead of 1000? Angus. i'm lost On Mon, Jul 26, 2010 at 1:42 PM, phob...@geosyntec.com wrote: Make sure that you’re dividing by 1000.0 (as opposed to 1000) to avoid any integer nonsense and make sure to reset your axis limits. Posting a small code snippet would help us get you on the right track. -p From: Waléria Antunes David [mailto:waleriantu...@gmail.com] Sent: Monday, July 26, 2010 9:32 AM To: Matthieu Brucher Cc: matplotlib-users@lists.sourceforge.net Subject: Re: [Matplotlib-users] Hz to KHz I know...I tried but I'm using django and also when divided by 1000 the image does not appear... I don't know what to do.help me On Mon, Jul 26, 2010 at 1:27 PM, Matthieu Brucher matthieu.bruc...@gmail.com wrote: Hi, You may just divide them by 1000? Matthieu 2010/7/26 Waléria Antunes David waleriantu...@gmail.com: Hello all, I need to format the values of graphic to KHz.my values are in Hz see at idle python it displays the values as: 3000 3050 3100 3400 , but I need to go where it will be displayed KHz: 3.0 3.1 can someone help me? -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Information System Engineer, Ph.D. Blog: http://matt.eifelle.com LinkedIn: http://www.linkedin.com/in/matthieubrucher -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- AJC McMorland Post-doctoral research fellow Neurobiology, University of Pittsburgh -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Hz to KHz
i don't understand.. On Mon, Jul 26, 2010 at 1:57 PM, Angus McMorland amcm...@gmail.com wrote: On 26 July 2010 12:47, Waléria Antunes David waleriantu...@gmail.com wrote: My code like this in django: http://pastebin.com/nzM5jvuc Are you perhaps suffering from integer division? How about dividing by 1000.0, instead of 1000? Angus. i'm lost On Mon, Jul 26, 2010 at 1:42 PM, phob...@geosyntec.com wrote: Make sure that you’re dividing by 1000.0 (as opposed to 1000) to avoid any integer nonsense and make sure to reset your axis limits. Posting a small code snippet would help us get you on the right track. -p From: Waléria Antunes David [mailto:waleriantu...@gmail.com] Sent: Monday, July 26, 2010 9:32 AM To: Matthieu Brucher Cc: matplotlib-users@lists.sourceforge.net Subject: Re: [Matplotlib-users] Hz to KHz I know...I tried but I'm using django and also when divided by 1000 the image does not appear... I don't know what to do.help me On Mon, Jul 26, 2010 at 1:27 PM, Matthieu Brucher matthieu.bruc...@gmail.com wrote: Hi, You may just divide them by 1000? Matthieu 2010/7/26 Waléria Antunes David waleriantu...@gmail.com: Hello all, I need to format the values of graphic to KHz.my values are in Hz see at idle python it displays the values as: 3000 3050 3100 3400 , but I need to go where it will be displayed KHz: 3.0 3.1 can someone help me? -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Information System Engineer, Ph.D. Blog: http://matt.eifelle.com LinkedIn: http://www.linkedin.com/in/matthieubrucher -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- AJC McMorland Post-doctoral research fellow Neurobiology, University of Pittsburgh -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Hz to KHz
Replace this line: ax.plot(f/1000, Sserie) With this line: ax.plot(f/1000.0, Sserie) And tell us how things go. Python 2.6 distinguishes between integers and floats very strictly. Hence: In [1]: 20/1000 Out[1]: 0 In [2]: 20.0/1000.0 Out[2]: 0.02 See the difference? -paul From: Waléria Antunes David [mailto:waleriantu...@gmail.com] Sent: Monday, July 26, 2010 10:01 AM To: Angus McMorland Cc: matplotlib-users@lists.sourceforge.net Subject: Re: [Matplotlib-users] Hz to KHz i don't understand.. On Mon, Jul 26, 2010 at 1:57 PM, Angus McMorland amcm...@gmail.commailto:amcm...@gmail.com wrote: On 26 July 2010 12:47, Waléria Antunes David waleriantu...@gmail.commailto:waleriantu...@gmail.com wrote: My code like this in django: http://pastebin.com/nzM5jvuc Are you perhaps suffering from integer division? How about dividing by 1000.0, instead of 1000? Angus. i'm lost On Mon, Jul 26, 2010 at 1:42 PM, phob...@geosyntec.commailto:phob...@geosyntec.com wrote: Make sure that you're dividing by 1000.0 (as opposed to 1000) to avoid any integer nonsense and make sure to reset your axis limits. Posting a small code snippet would help us get you on the right track. -p From: Waléria Antunes David [mailto:waleriantu...@gmail.commailto:waleriantu...@gmail.com] Sent: Monday, July 26, 2010 9:32 AM To: Matthieu Brucher Cc: matplotlib-users@lists.sourceforge.netmailto:matplotlib-users@lists.sourceforge.net Subject: Re: [Matplotlib-users] Hz to KHz I know...I tried but I'm using django and also when divided by 1000 the image does not appear... I don't know what to do.help me On Mon, Jul 26, 2010 at 1:27 PM, Matthieu Brucher matthieu.bruc...@gmail.commailto:matthieu.bruc...@gmail.com wrote: Hi, You may just divide them by 1000? Matthieu 2010/7/26 Waléria Antunes David waleriantu...@gmail.commailto:waleriantu...@gmail.com: Hello all, I need to format the values of graphic to KHz.my values are in Hz see at idle python it displays the values as: 3000 3050 3100 3400 , but I need to go where it will be displayed KHz: 3.0 3.1 can someone help me? -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.netmailto:Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Information System Engineer, Ph.D. Blog: http://matt.eifelle.com LinkedIn: http://www.linkedin.com/in/matthieubrucher -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.netmailto:Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- AJC McMorland Post-doctoral research fellow Neurobiology, University of Pittsburgh -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Hz to KHz
On 26 July 2010 13:01, Waléria Antunes David waleriantu...@gmail.com wrote: i don't understand.. python (version 3, I think) uses integer division when given integer values, i.e. 1/1000 = 0, at the expense of giving a less accurate answer than we might expect. If you tried to plot a bunch of values divided by 1000, they may well all be integer 0, and so you wouldn't see any line (it would be at the x-axis). You would need to force python to do floating point division: 1/1000.0 = 0.001; to do this you need to make sure one of the numbers in the division is floating point: the simplest way to do this is 1/1000.0 (or 1/1000. for short). I hope that helps, Angus. On Mon, Jul 26, 2010 at 1:57 PM, Angus McMorland amcm...@gmail.com wrote: On 26 July 2010 12:47, Waléria Antunes David waleriantu...@gmail.com wrote: My code like this in django: http://pastebin.com/nzM5jvuc Are you perhaps suffering from integer division? How about dividing by 1000.0, instead of 1000? Angus. i'm lost On Mon, Jul 26, 2010 at 1:42 PM, phob...@geosyntec.com wrote: Make sure that you’re dividing by 1000.0 (as opposed to 1000) to avoid any integer nonsense and make sure to reset your axis limits. Posting a small code snippet would help us get you on the right track. -p From: Waléria Antunes David [mailto:waleriantu...@gmail.com] Sent: Monday, July 26, 2010 9:32 AM To: Matthieu Brucher Cc: matplotlib-users@lists.sourceforge.net Subject: Re: [Matplotlib-users] Hz to KHz I know...I tried but I'm using django and also when divided by 1000 the image does not appear... I don't know what to do.help me On Mon, Jul 26, 2010 at 1:27 PM, Matthieu Brucher matthieu.bruc...@gmail.com wrote: Hi, You may just divide them by 1000? Matthieu 2010/7/26 Waléria Antunes David waleriantu...@gmail.com: Hello all, I need to format the values of graphic to KHz.my values are in Hz see at idle python it displays the values as: 3000 3050 3100 3400 , but I need to go where it will be displayed KHz: 3.0 3.1 can someone help me? -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Information System Engineer, Ph.D. Blog: http://matt.eifelle.com LinkedIn: http://www.linkedin.com/in/matthieubrucher -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- AJC McMorland Post-doctoral research fellow Neurobiology, University of Pittsburgh -- AJC McMorland Post-doctoral research fellow Neurobiology, University of Pittsburgh -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Hz to KHz
On Jul 26, 2010 at 02:01 PM -0300, Waléria Antunes David wrote: i don't understand.. Just divide through by '1000.' or '1000.0' (same thing). If you write 3100/1000, you'll get '3' because you are doing integer math. If you write 3100/1000.0, you'll get '3.1' because you are doing float math. -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Hz to KHz
I did what you showed me but the image disappears On Mon, Jul 26, 2010 at 2:06 PM, phob...@geosyntec.com wrote: Replace this line: ax.plot(f/1000, Sserie) With this line: ax.plot(f/1000.0, Sserie) And tell us how things go. Python 2.6 distinguishes between integers and floats very strictly. Hence: In [1]: 20/1000 Out[1]: 0 In [2]: 20.0/1000.0 Out[2]: 0.02 See the difference? -paul *From:* Waléria Antunes David [mailto:waleriantu...@gmail.com] *Sent:* Monday, July 26, 2010 10:01 AM *To:* Angus McMorland *Cc:* matplotlib-users@lists.sourceforge.net *Subject:* Re: [Matplotlib-users] Hz to KHz i don't understand.. On Mon, Jul 26, 2010 at 1:57 PM, Angus McMorland amcm...@gmail.com wrote: On 26 July 2010 12:47, Waléria Antunes David waleriantu...@gmail.com wrote: My code like this in django: http://pastebin.com/nzM5jvuc Are you perhaps suffering from integer division? How about dividing by 1000.0, instead of 1000? Angus. i'm lost On Mon, Jul 26, 2010 at 1:42 PM, phob...@geosyntec.com wrote: Make sure that you’re dividing by 1000.0 (as opposed to 1000) to avoid any integer nonsense and make sure to reset your axis limits. Posting a small code snippet would help us get you on the right track. -p From: Waléria Antunes David [mailto:waleriantu...@gmail.com] Sent: Monday, July 26, 2010 9:32 AM To: Matthieu Brucher Cc: matplotlib-users@lists.sourceforge.net Subject: Re: [Matplotlib-users] Hz to KHz I know...I tried but I'm using django and also when divided by 1000 the image does not appear... I don't know what to do.help me On Mon, Jul 26, 2010 at 1:27 PM, Matthieu Brucher matthieu.bruc...@gmail.com wrote: Hi, You may just divide them by 1000? Matthieu 2010/7/26 Waléria Antunes David waleriantu...@gmail.com: Hello all, I need to format the values of graphic to KHz.my values are in Hz see at idle python it displays the values as: 3000 3050 3100 3400 , but I need to go where it will be displayed KHz: 3.0 3.1 can someone help me? -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Information System Engineer, Ph.D. Blog: http://matt.eifelle.com LinkedIn: http://www.linkedin.com/in/matthieubrucher -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- AJC McMorland Post-doctoral research fellow Neurobiology, University of Pittsburgh -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Plotting with varied marker sizes, or a scatter with connecting lines?
Hi everyone, I'm new to matplotlib, and I would like to create a typical plot of a timecourse (markers connected by lines), with the markers varying in size and/or style according to a separate set of data that corresponds to each timepoint. However, my understanding is that plot() will not accept an array of marker sizes, only a single float value that is applied to all markers. On the other hand, scatter() does allow variably-sized markers (as in the scatter_demo2.py example). However, there does not seem to be a straightforward way to add lines to this plot connecting markers in sequence. Can anyone recommend a work-around to this issue, or point out if I've missed something in the documentation? Thanks, Tim -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Import matplotlib.pyplot fails on windows XP
From: ben.r...@ou.edu Date: Mon, 26 Jul 2010 09:56:27 -0500 Subject: Re: [Matplotlib-users] Import matplotlib.pyplot fails on windows XP To: ecker...@hotmail.com CC: matplotlib-users@lists.sourceforge.net On Sat, Jul 24, 2010 at 4:57 AM, eck naysmith ecker...@hotmail.com wrote: Hello, I've installed the following Python packages on a Windows XP machine: Python 2.6.5 Python 2.6 numpy-1.4.1 Python 2.6 matplotlib-0.99.3 [installer - matplotlib-0.99.3.win32-py2.6] Python and Numpy work correctly. Matplotlib also works and as a test I tried successfully the following on the python interpretor: from matplotlib.pyplot import * plot([1,2,3]) show() A graph then appears and thus so far so good. However, when I try to run a certain python script, a problem occurs when importing from matplotlib: Traceback (most recent call last): File C:\Pythoncode\Games\Bridge_war_2\unitload2.py, line 2, in module from matplotlib.pyplot import plot, ylabel,xlabel, show File C:\Python26\lib\site-packages\matplotlib\pyplot.py, line 78, in module new_figure_manager, draw_if_interactive, show = pylab_setup() File C:\Python26\lib\site-packages\matplotlib\backends\__init__.py, line 25, in pylab_setup globals(),locals(),[backend_name]) File C:\Python26\lib\site-packages\matplotlib\backends\backend_tkagg.py, line 7, in module import Tkinter as Tk, FileDialog File C:\Python26\lib\lib-tk\FileDialog.py, line 12, in module from Dialog import Dialog File C:\Pythoncode\Games\Bridge_war_2\Dialog.py, line 2, in module import wx ImportError: No module named wx The error is that your Windows XP box does not have the wxPython module installed for Windows. http://www.wxpython.org/download.php I hope that helps, Ben Root No calls are made anywhere for wxPython so I don't know why it is seeking it. But when I installed wxPython anyway just to see what would happen, the traceback then ends at the penultimate line shown above i.e File C:\Python26\lib\lib-tk\FileDialog.py, line 12, in module from Dialog import Dialog On the Traceback, each line beggining with 'File C:\Python26... is a seperate error. The most significant error is the first one: 'Traceback (most recent call last): File C:\Pythoncode\Games\Bridge_war_2\unitload2.py, line 2, in module from matplotlib.pyplot import plot, ylabel,xlabel, show' I suspected the problems were arising from the use of the statement 'from numpy import foobar' overwriting some of the names used by matplotlib, so I changed the import statement to 'import numpy' to avoid any potential namespace clash and adjusted the code accordingly. This does nothing and the exact same Traceback error messages occur. Regards Alex _ http://clk.atdmt.com/UKM/go/195013117/direct/01/ We want to hear all your funny, exciting and crazy Hotmail stories. Tell us now-- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] rotating 3d axis
Hi Is there any way to let the user rotate a 3D plot? I don't see an example which does this. -Mathew -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] rotating 3d axis
On Mon, Jul 26, 2010 at 2:50 PM, Mathew Yeates mat.yea...@gmail.com wrote: Hi Is there any way to let the user rotate a 3D plot? I don't see an example which does this. -Mathew What do you mean? By default, all 3D plots are rotatable by merely clicking and draging the plot around. Or are you referring to how to set camera view points? Ben Root -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Plotting with varied marker sizes, or a scatter with connecting lines?
On 07/26/2010 08:18 PM, Timothy Vickery wrote: Hi everyone, I'm new to matplotlib, and I would like to create a typical plot of a timecourse (markers connected by lines), with the markers varying in size and/or style according to a separate set of data that corresponds to each timepoint. However, my understanding is that plot() will not accept an array of marker sizes, only a single float value that is applied to all markers. On the other hand, scatter() does allow variably-sized markers (as in the scatter_demo2.py example). However, there does not seem to be a straightforward way to add lines to this plot connecting markers in sequence. Can anyone recommend a work-around to this issue, or point out if I've missed something in the documentation? Thanks, Tim You could use plot and scatter on the same plot. See the attached example. #--- import numpy as np import matplotlib.pyplot as plt N = 100 x = np.linspace(-10.0,10.0,N) y = 50.0*np.exp(-x**2) size = 100.0*np.abs(np.sin(x)) plt.plot(x,y) plt.scatter(x,y,s=size) plt.show() #--- Regards, João Luís #!/usr/bin/env python import numpy as np import matplotlib.pyplot as plt N = 100 x = np.linspace(-10.0,10.0,N) y = 50.0*np.exp(-x**2) size = 100.0*np.abs(np.sin(x)) plt.plot(x,y) plt.scatter(x,y,s=size) plt.show() attachment: plot_and_scatter.png-- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Documentation error/bug?
On Mon, Jul 26, 2010 at 9:49 AM, Benjamin Root ben.r...@ou.edu wrote: On Sat, Jul 24, 2010 at 1:51 PM, Josh Lawrence josh.k.lawre...@gmail.comwrote: Hello, I looked on your website for the different line styles. In the documentation for matplotlib.lines.line2D.set_linestyle, the dashed linestyle is listed as '-' and not '--'. It it my understanding that dashed should be '--'. If I'm incorrect, sorry for the noise. Cheers, -- Josh Lawrence Ph.D. Student Clemson University Looks like the formatter for the online documentation took the double-dash to mean a long line, much like how LaTeX does. Anybody know how to make the double-dash appear as two distinct dashes? http://matplotlib.sourceforge.net/api/artist_api.html?highlight=set_linestyle#matplotlib.lines.Line2D.set_linestyle Ben Root After some reading of sphinx documentation, it appears to be a bug with sphinx (or actually, smartypants) because it should not be doing this sort of interpretation within a docstring. Anyway, supposedly the workaround is to put double backticks around the part that needs to be treated literally: ``'--'``. I tried this out and built the docs locally and it works... sort of. The text that is surrounded by double backticks are getting a different background color. This doesn't look great to me. Maybe someone else has a thought? Ben Root -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Fit a plane to a set of xyz points
Is there a simple function call for this? And finding the distance of a point to the plane? -Mathew -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Bypass keyboard navigation
Hello! My name is David Mashburn, and I have been a very happy user of matplotlib for almost 5 years now, so let me start by saying thank you for this wonderful piece of software! I has been a blessing to me! I am creating a program that performs actions based on key commands in matplotlib, and I keep bumping into conflicts with the interactive keyboard navigation system. Is there any way to bypass or disable some or all of the keybindings hooked to interactive navigation? By the way, I'm using the WxAgg backend if that matters. Thanks! -David -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Import matplotlib.pyplot fails on windows XP
Problem solved. When I set up python on the Windows machine, I simply copied over the directories and everything in them from my Linux machine, including all of the python bytecode *.pyc files. Trying to run a script with those *.pyc files present was causing the problem as they were compiled on my Linux machine originally. The matplotlib call works fine when I move the scripts to a clean folder. Thanks Alex From: ben.r...@ou.edu Date: Mon, 26 Jul 2010 09:56:27 -0500 Subject: Re: [Matplotlib-users] Import matplotlib.pyplot fails on windows XP To: ecker...@hotmail.com CC: matplotlib-users@lists.sourceforge.net On Sat, Jul 24, 2010 at 4:57 AM, eck naysmith ecker...@hotmail.com wrote: Hello, I've installed the following Python packages on a Windows XP machine: Python 2.6.5 Python 2.6 numpy-1.4.1 Python 2.6 matplotlib-0.99.3 [installer - matplotlib-0.99.3.win32-py2.6] Python and Numpy work correctly. Matplotlib also works and as a test I tried successfully the following on the python interpretor: from matplotlib.pyplot import * plot([1,2,3]) show() A graph then appears and thus so far so good. However, when I try to run a certain python script, a problem occurs when importing from matplotlib: Traceback (most recent call last): File C:\Pythoncode\Games\Bridge_war_2\unitload2.py, line 2, in module from matplotlib.pyplot import plot, ylabel,xlabel, show File C:\Python26\lib\site-packages\matplotlib\pyplot.py, line 78, in module new_figure_manager, draw_if_interactive, show = pylab_setup() File C:\Python26\lib\site-packages\matplotlib\backends\__init__.py, line 25, in pylab_setup globals(),locals(),[backend_name]) File C:\Python26\lib\site-packages\matplotlib\backends\backend_tkagg.py, line 7, in module import Tkinter as Tk, FileDialog File C:\Python26\lib\lib-tk\FileDialog.py, line 12, in module from Dialog import Dialog File C:\Pythoncode\Games\Bridge_war_2\Dialog.py, line 2, in module import wx ImportError: No module named wx The error is that your Windows XP box does not have the wxPython module installed for Windows. http://www.wxpython.org/download.php I hope that helps, Ben Root _ http://clk.atdmt.com/UKM/go/19780/direct/01/ We want to hear all your funny, exciting and crazy Hotmail stories. Tell us now-- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Contour plots with same color mapping
Hello, I would like to draw a couple of contour plots. The plots are on separate figures, but they should all have exactly the same color mapping (i.e, the same Z value should correspond to the same color in all plots). What's the best way to achieve this? From the documentation I gather that I should use the norm and extend keyword arguments, but I wasn't really able to figure out what values I have to pass and how the matplotlib.colors.Normalize instance works. Thanks, -Nikolaus -- »Time flies like an arrow, fruit flies like a Banana.« PGP fingerprint: 5B93 61F8 4EA2 E279 ABF6 02CF A9AD B7F8 AE4E 425C -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Bypass keyboard navigation
On 07/26/2010 10:18 AM, Benjamin Root wrote: On Mon, Jul 26, 2010 at 3:09 PM, David Mashburn david.n.mashb...@gmail.com mailto:david.n.mashb...@gmail.com wrote: Hello! My name is David Mashburn, and I have been a very happy user of matplotlib for almost 5 years now, so let me start by saying thank you for this wonderful piece of software! I has been a blessing to me! I am creating a program that performs actions based on key commands in matplotlib, and I keep bumping into conflicts with the interactive keyboard navigation system. Is there any way to bypass or disable some or all of the keybindings hooked to interactive navigation? By the way, I'm using the WxAgg backend if that matters. Thanks! -David David, I have not tested this myself, but I believe that if you set navigate=False as a keyword argument for making your axes, this will stop the callbacks from being registered. That completely disables the toolbar, which is likely not what the OP wants. There are a bunch of rcParams, listed at the bottom of matplotlibrc_template (and of the default matplotlibrc file that is installed) that can be used to turn off the key bindings without disabling the toolbar. Personally, I think that putting in all those key bindings by default was a major mistake, one that should be reversed ASAP. Having the plot jump to fullscreen when one bumps f is rude. The first time it happened I had no idea what was going on or how to recover from it--I thought maybe my X-server had gone bonkers. And does one actually save a displayed figure so often that it is useful to have the s shortcut to save one from having to click the toolbar button? I could go on with this complaint... Eric Thanks for using matplotlib! Ben Root -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Contour plots with same color mapping
On 07/26/2010 10:13 AM, Nikolaus Rath wrote: Hello, I would like to draw a couple of contour plots. The plots are on separate figures, but they should all have exactly the same color mapping (i.e, the same Z value should correspond to the same color in all plots). What's the best way to achieve this? I think that all you will need is to specify the same cmap (if you are not using the default) and contour levels for both plots. You should not need to use the norm, unless you are doing something fancy; and in that case, all you need to do is specify the same norm for both plots. The real key, though, is explicitly specifying the set of contour levels that you want, and using the same one for both plots. e.g.: from pylab import * # yes, this is not recommended... clevs = arange(0.3, 0.701, 0.1) fig1 = figure() contourf(rand(20,20), levels=clevs, extend='both') colorbar() fig2 = figure() contourf(rand(30,40), levels=clevs, extend='both') colorbar() show() You need to use the extend argument only if you want values beyond the levels you specify to constitute open-ended ranges. For example, if you have data values from 0 to 10, but most are between 4 and 6, you could specify levels as numpy.arange(4, 6.01, 0.1) and use extend='both'. Then all values greater than 6 would get a color at one end, and all values less than 4 would get another color at the other end. If you use a colorbar, it will see the extend argument that was used in contourf, and draw the colorbar with pointed ends to indicate anything over and anything under. As illustrated above. Eric From the documentation I gather that I should use the norm and extend keyword arguments, but I wasn't really able to figure out what values I have to pass and how the matplotlib.colors.Normalize instance works. Thanks, -Nikolaus -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Bypass keyboard navigation
Ben and Eric, Thanks so much for your help! I'm trying to turn change some of the rcParams in my script... Here is a test of what happens: import matplotlib matplotlib.rcParams['keymap.fullscreen']='' Traceback (most recent call last): File input, line 1, in module File /usr/lib/pymodules/python2.6/matplotlib/__init__.py, line 623, in __setitem__ See rcParams.keys() for a list of valid parameters.'%key) KeyError: 'keymap.fullscreen is not a valid rc parameter.See rcParams.keys() for a list of valid parameters.' It seems that none of the keymap parameters are defined in my rcParams dictionary... I also tried adding some of the keymap lines out of the online rc file: http://matplotlib.sf.net/_static/matplotlibrc to my rc file and it told me: Bad key keymap.pan I've got version 0.99.0 on ubuntu. Is this a new feature? Do you know what I can try instead?? Thanks! -David On 07/26/2010 10:18 AM, Benjamin Root wrote: On Mon, Jul 26, 2010 at 3:09 PM, David Mashburn david.n.mashb...@gmail.com mailto:david.n.mashb...@gmail.com mailto:david.n.mashb...@gmail.com mailto:david.n.mashb...@gmail.com wrote: Hello! My name is David Mashburn, and I have been a very happy user of matplotlib for almost 5 years now, so let me start by saying thank you for this wonderful piece of software! I has been a blessing to me! I am creating a program that performs actions based on key commands in matplotlib, and I keep bumping into conflicts with the interactive keyboard navigation system. Is there any way to bypass or disable some or all of the keybindings hooked to interactive navigation? By the way, I'm using the WxAgg backend if that matters. Thanks! -David David, I have not tested this myself, but I believe that if you set navigate=False as a keyword argument for making your axes, this will stop the callbacks from being registered. That completely disables the toolbar, which is likely not what the OP wants. There are a bunch of rcParams, listed at the bottom of matplotlibrc_template (and of the default matplotlibrc file that is installed) that can be used to turn off the key bindings without disabling the toolbar. Personally, I think that putting in all those key bindings by default was a major mistake, one that should be reversed ASAP. Having the plot jump to fullscreen when one bumps f is rude. The first time it happened I had no idea what was going on or how to recover from it--I thought maybe my X-server had gone bonkers. And does one actually save a displayed figure so often that it is useful to have the s shortcut to save one from having to click the toolbar button? I could go on with this complaint... Eric Thanks for using matplotlib! Ben Root -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Bypass keyboard navigation
On 07/26/2010 12:17 PM, David Mashburn wrote: Ben and Eric, Thanks so much for your help! I'm trying to turn change some of the rcParams in my script... Here is a test of what happens: import matplotlib matplotlib.rcParams['keymap.fullscreen']='' Traceback (most recent call last): File input, line 1, inmodule File /usr/lib/pymodules/python2.6/matplotlib/__init__.py, line 623, in __setitem__ See rcParams.keys() for a list of valid parameters.'%key) KeyError: 'keymap.fullscreen is not a valid rc parameter.See rcParams.keys() for a list of valid parameters.' It seems that none of the keymap parameters are defined in my rcParams dictionary... I also tried adding some of the keymap lines out of the online rc file: http://matplotlib.sf.net/_static/matplotlibrc to my rc file and it told me: Bad key keymap.pan I've got version 0.99.0 on ubuntu. Aha! I thought you were using 1.0. For 1.0, these things are rc settings; I had no idea they even existed back in 0.99.0. I only tripped over f very recently. The key bindings are coded in the key_press() method of FigureManagerBase. The callback is connected to the canvas in the __init__ method. The trick is to disconnect the callback: fig = figure() fig.canvas.mpl_disconnect(3) plot([1,2,3]) Now key presses have no effect in that figure. The bad thing here is that I used the cid 3, a seemingly random number. I suspect, though, that once you find out what it is in your version of mpl (and it may still be 3), you will be able to rely on it for your purposes. To find it, print out fig.canvas.callbacks.callbacks and look for key_press_event. You could have your program use this dictionary to look it up. Eric Is this a new feature? Do you know what I can try instead?? Thanks! -David On 07/26/2010 10:18 AM, Benjamin Root wrote: On Mon, Jul 26, 2010 at 3:09 PM, David Mashburn david.n.mashb...@gmail.commailto:david.n.mashb...@gmail.com mailto:david.n.mashb...@gmail.commailto:david.n.mashb...@gmail.com wrote: Hello! My name is David Mashburn, and I have been a very happy user of matplotlib for almost 5 years now, so let me start by saying thank you for this wonderful piece of software! I has been a blessing to me! I am creating a program that performs actions based on key commands in matplotlib, and I keep bumping into conflicts with the interactive keyboard navigation system. Is there any way to bypass or disable some or all of the keybindings hooked to interactive navigation? By the way, I'm using the WxAgg backend if that matters. Thanks! -David David, I have not tested this myself, but I believe that if you set navigate=False as a keyword argument for making your axes, this will stop the callbacks from being registered. That completely disables the toolbar, which is likely not what the OP wants. There are a bunch of rcParams, listed at the bottom of matplotlibrc_template (and of the default matplotlibrc file that is installed) that can be used to turn off the key bindings without disabling the toolbar. Personally, I think that putting in all those key bindings by default was a major mistake, one that should be reversed ASAP. Having the plot jump to fullscreen when one bumps f is rude. The first time it happened I had no idea what was going on or how to recover from it--I thought maybe my X-server had gone bonkers. And does one actually save a displayed figure so often that it is useful to have the s shortcut to save one from having to click the toolbar button? I could go on with this complaint... Eric Thanks for using matplotlib! Ben Root -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
