Re: [Matplotlib-users] Problem with show()
Eric Firing efir...@... writes: For this to work, you need to be in matplotlib's interactive mode, either by running ipython with the -pylab option, or by calling plt.ion() before your call to show(). In either of these cases, your example code works for me with ipython from git, mpl from svn, and using drag/drop to enter the code in ipython. I am also on ubuntu 10.10, 64-bit, with gtkagg backend. Eric I was running my example with the -pylab option set in ipython, and adding a call to plt.ion() doesn't change things. I also run gtkagg backend. I guess I have a problem with my installation of matplotlib, unless this is something that changed after mpl-1.0. I will try mpl-svn next and see. Regards, Jorge -- Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] subplot grids with EPD
On Wed, Oct 6, 2010 at 10:31 AM, Jakub Nowacki j.s.nowa...@gmail.com wrote: Hi, Personally I've tried to install Matplotlib 1.0.0 manually in EPD on Mac and Linux. For some reason on Linux it went totally OK from the first try (just had to define PREFIX correctly). On Mac I've tried to do the same but for some reason the libs are linked somehow differently and while the installation went OK (at least it didn't complain) mpl didn't work. I admit I don't have that much experience with Mac linking but it seems to be the issue. BTW have you tried to force 32-bit compilation using 'arch'? I was getting such messages when I've tired to run 64-bit module with 32-bit Python (didn't specify arch correctly). Thanks for the information. For me it is the same - the build completes successfully but I get the bus error when importing pyplot. I think it is 32 bit... I am installing to a 32 bit Python. Also in the past when I've had arch errors like that they show up at linking rather than runtime, and I think from the stack trace it is getting into the extension module ft2font - if it was 64 vs 32 bit I think it wouldn't load the .so. I am not sure if EPD is built with intel compilers and MKL - perhaps that could be the issue. Unfortunately I don't have intel compiler available to test. In the end I built against a fresh python.org 2.7 install and reinstalled numpy and scipy. Cheers Robin Best wishes, Jakub On 10/05/2010 03:26 PM, Robin wrote: Hi, I am using EPD 6.2 (32 bit) on a mac. I would like to use subplot grids (matplotlib.gridspec) which seems to require mpl 1.0.0. Is there anyway to install this and use it with EPD? So far I have tried everything from the installation guide, but whatever I do I get a bus error in ft2font. I can't get the wx backend to show up in the config stage (although wx is installed in EPD). I have tried building it myself, with the make.osx script, and with the EPD guide on the installation page, both with gcc 4.0 and gcc 4.2 but everything gives the same bus error. I'm actually not sure what compiler is used for EPD so perhaps that is the problem. Alternatively, is there a way to pick out the subplot grid features and use them with the epd matplotlib? If anyone is interested this is the error I get: Exception Type: EXC_BAD_ACCESS (SIGBUS) Exception Codes: KERN_PROTECTION_FAILURE at 0x Crashed Thread: 0 Dispatch queue: com.apple.main-thread Thread 0 Crashed: Dispatch queue: com.apple.main-thread 0 ??? 00 0 + 0 1 libSystem.B.dylib 0x96f31108 _Unwind_GetLanguageSpecificData + 24 2 libstdc++.6.dylib 0x97166d86 __gxx_personality_v0 + 120 3 libgcc_s.1.dylib 0x0040b476 _Unwind_RaiseException_Phase2 + 102 (unwind.inc:68) 4 libgcc_s.1.dylib 0x0040b890 _Unwind_Resume + 112 (unwind.inc:238) 5 ft2font.so 0x04501a98 FT2Font::FT2Font(std::string) + 4776 (ExtensionOldType.hxx:88) 6 ft2font.so 0x04501fd3 ft2font_module::new_ft2font(Py::Tuple const) + 515 (ft2font.cpp:1969) 7 ft2font.so 0x045041b6 Py::ExtensionModuleft2font_module::invoke_method_varargs(void*, Py::Tuple const) + 102 (ExtensionModule.hxx:184) 8 ft2font.so 0x0450db87 method_varargs_call_handler + 343 9 org.python.python 0x000cbfd5 PyEval_EvalFrameEx + 19429 10 org.python.python 0x000ce14d PyEval_EvalCodeEx + 2109 11 org.python.python 0x000cc1bc PyEval_EvalFrameEx + 19916 12 org.python.python 0x000ce14d PyEval_EvalCodeEx + 2109 13 org.python.python 0x0004b136 function_call + 166 14 org.python.python 0x00019b05 PyObject_Call + 85 15 org.python.python 0x0002c0e6 instancemethod_call + 422 16 org.python.python 0x00019b05 PyObject_Call + 85 17 org.python.python 0x000c642e PyEval_CallObjectWithKeywords + 78 18 org.python.python 0x0002efb2 PyInstance_New + 114 19 org.python.python 0x00019b05 PyObject_Call + 85 20 org.python.python 0x000ca927 PyEval_EvalFrameEx + 13623 21 org.python.python 0x000cc956 PyEval_EvalFrameEx + 21862 22 org.python.python 0x000ce14d PyEval_EvalCodeEx + 2109 23 org.python.python 0x000ce2d7 PyEval_EvalCode + 87 24 org.python.python 0x000e5a3c PyImport_ExecCodeModuleEx + 188 25 org.python.python 0x000e66dc load_source_module + 540 26 org.python.python 0x000e72fd import_submodule + 301 27 org.python.python 0x000e7559 load_next + 201 28 org.python.python 0x000e7f53 PyImport_ImportModuleLevel + 419 29
Re: [Matplotlib-users] bug: axes.hitlist() ?
On Tue, Oct 5, 2010 at 11:39 PM, Daniel Hyams dhy...@gmail.com wrote:
I've run across a strange problem and perhaps I'm misusing something. I
was trying to set up picking so that I can interact with plotted objects,
and I get alot of error spew that looks like this:
while checking class 'matplotlib.lines.Line2D'
Traceback (most recent call last):
File C:\Python26\lib\site-packages\matplotlib\artist.py, line 241, in
hitlist
hascursor,info = self.contains(event)
File C:\Python26\lib\site-packages\matplotlib\lines.py, line 286, in
contains
path, affine = self._transformed_path.get_transformed_path_and_affine()
AttributeError: 'NoneType' object has no attribute
'get_transformed_path_and_affine'
This can be reproduced by the following code, even though there is no
picking involved...just mouse motion. Is there possibly a workaround for
this, or am I doing something wrong?
import sys
from pylab import *
ax = subplot(111)
ax.plot([0,1,2,3])
def on_move(event):
if event.inaxes:
lst = ax.hitlist(event)
print lst
binding_id = connect('motion_notify_event', on_move)
show()
--
Daniel Hyams
dhy...@gmail.com
Daniel,
I am not exactly sure of your exact issue, but I did notice something a
little off about your current code. In on_move(), you reference 'ax', but
that is never passed in or defined in the function itself. Therefore, it is
refering to the 'ax' that is in your global namespace. This seems to be a
side issue, however.
Ben Root
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Re: [Matplotlib-users] Problem with show()
On Wed, Oct 6, 2010 at 3:21 AM, Jorge Scandaliaris jorgesmbox...@yahoo.eswrote: Jorge Scandaliaris jorgesmbox...@... writes: I was running my example with the -pylab option set in ipython, and adding a call to plt.ion() doesn't change things. I also run gtkagg backend. I guess I have a problem with my installation of matplotlib, unless this is something that changed after mpl-1.0. I will try mpl-svn next and see. Luckily enough, using mpl-svn solved the problem. BTW, I had issues following the instructions for cloning the git mirror ( http://matplotlib.sourceforge.net/devel/coding_guide.html#cloning-the-git-mirror ). Something changed in github, or there's typo somewhere? Instead of: # Download the entire git repository into matplotlib, name the source repository svn. git clone --origin svn g...@github.com:astraw/matplotlib.git I ended up doing: git clone --origin svn git://github.com/astraw/matplotlib.git The rest of instructions worked fine (at least it seems to me). Regards, Jorge Yeah, those instructions should be changed. The current instructions would presume that you would use your github username in-place of the 'git' username. Your command works fine for everyone who just wants to pull from the repo. Ben Root -- Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] bug: axes.hitlist() ?
On Tue, Oct 5, 2010 at 11:39 PM, Daniel Hyams dhy...@gmail.com wrote:
I've run across a strange problem and perhaps I'm misusing something. I was
trying to set up picking so that I can interact with plotted objects, and I
get alot of error spew that looks like this:
while checking class 'matplotlib.lines.Line2D'
Traceback (most recent call last):
File C:\Python26\lib\site-packages\matplotlib\artist.py, line 241, in
hitlist
hascursor,info = self.contains(event)
File C:\Python26\lib\site-packages\matplotlib\lines.py, line 286, in
contains
path, affine = self._transformed_path.get_transformed_path_and_affine()
AttributeError: 'NoneType' object has no attribute
'get_transformed_path_and_affine'
This can be reproduced by the following code, even though there is no
picking involved...just mouse motion. Is there possibly a workaround for
this, or am I doing something wrong?
import sys
from pylab import *
ax = subplot(111)
ax.plot([0,1,2,3])
def on_move(event):
if event.inaxes:
lst = ax.hitlist(event)
print lst
binding_id = connect('motion_notify_event', on_move)
show()
It looks like Line2D.contains() was relying on some attributes that
were set by draw(). I'm not sure why those lines are not drawn (it
looks like some axis line?), but contains() shouldn't cause a
traceback regardless. I've fixed this in SVN. If you're not running
SVN, the patch is small, but it should be noted that the error message
you're seeing is purely cosmetic and shouldn't be causing any
problems.
Ryan
--
Ryan May
Graduate Research Assistant
School of Meteorology
University of Oklahoma
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Re: [Matplotlib-users] Graph
On Wed, Oct 6, 2010 at 12:13 PM, Waléria Antunes David
waleriantu...@gmail.com wrote:
Hi all,
I ploted a graph and above this graph I plot another graph about data
errors.
so, the x-axis scale according with data errors only goes on 1.4, but I
would like to display up to 1.5. how I do that?
I also want to increase the space between 0.0 - 0.2, 0.2 - 0.4, so on so
that points can be better visualized.
My image attached
Thanks,
Waleria
To set the x limits:
ax.set_xlim([0.0, 1.5])
To increase the space between 0.0-0.2 and 0.2-0.4, you might want to
consider log scale (although zero values will cause problems)?
ax.set_xscale('log')
Ben Root
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Re: [Matplotlib-users] Graph
On 10/6/2010 1:13 PM, Waléria Antunes David wrote: the x-axis scale according with data errors only goes on 1.4, but I would like to display up to 1.5. how I do that? http://matplotlib.sourceforge.net/api/pyplot_api.html#matplotlib.pyplot.xlim I also want to increase the space between 0.0 - 0.2, 0.2 - 0.4, so on so that points can be better visualized. Change the figsize: http://matplotlib.sourceforge.net/api/pyplot_api.html#matplotlib.pyplot.figure hth, Alan Isaac -- Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Graph
2010/10/6 Waléria Antunes David waleriantu...@gmail.com: I ploted a graph and above this graph I plot another graph about data errors. You can do this in one step by using ax.errorbar() http://matplotlib.sourceforge.net/api/axes_api.html#matplotlib.axes.Axes.errorbar . Try using fmt=',', this will plot pixels as the markers. Friedrich -- Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Missing Toolbar Button inside Wx Application
From: Sebastian Rhode [mailto:sebrh...@googlemail.com] Sent: Wednesday, September 29, 2010 13:02 if I plot an normal figure the toolbar contains an button (looks like a checkbox), which can be used to edit the lines and axes parameters. But when I embed such a figure in an Wx application, this specfic button is missing. Is there a way around it? That tool is implemented in the Qt4 backends (and in only those backends, I believe). If your default backend is Qt4Agg, for example, you would see the tool when not embedding. For embedding with Wx, you would need the tool implemented in backend_wx.py, class NavigationToolbar2Wx. Should you like to look at the Qt4 code, it's in backend_qt4.py, class NavigationToolbar2QT. -- Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Issue with Redrawing a Line (numpy.ndarray, set_ydata, and draw)
I have a code that continuously modifies a numpy.ndarray variable. Then, I use set_ydata on the matplotlib.lines.Line2D object to the same ndarray variable. Then, I call fig.canvas.draw() to redraw the figure, where fig is Figure object. However, the line on the graph never changes. I print a few entries to the console to make sure that the variable is changing. It seems like the only way I can get the line to update is to create a completely new ndarray, update that variable with the new values and use set_ydata on my line object. Then, the redraw works. Other things that I tried that didn't seem to work were: L1.set_ydata(x[:]) L1.set_ydata(x.tolist()) L1.set_ydata(list(x)) where L1 is my line object, and x is my ndarray. To make it redraw I have to do something like this. xnew = numpy.zeros(numpy.size(x,0)) for k in range(numpy.size(x,0)): xnew[k] = x[k] L1.set_ydata(xnew) fig.canvas.draw() Is there some switch I can set to force a redraw of the elements? I feel like I am missing something fundamental. Thanks, Michael -- _ -- Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] New Mac binary installer for Python 2.6; do we bother with Python 2.5?
I finally got hold of a Mac that can run 10.4 and was finally able to build a new binary installer for Python 2.6 (as well as one for PIL 1.1.7) is truly compatible with Mac OS X 10.3.9. For now it is available here: http://www.astro.washington.edu/users/rowen/python/ though I hope it will end up on the official site at some point. I have not tested the wx back end and would be grateful if somebody had time to do so. I attempted to build a binary installer for Python 2.5.x but ran into problems: Mac binaries for Python 2.5 aren't compatible with 3rd party versions of Tk, which causes a mess for matplotlib. There are workarounds, but given the state of Mac python 2.5 I'm not sure it's worth the bother. I propose not having a matplotlib binary installer for Python 2.5 and getting a pair for Python 2.7 32-bit (10.3.9 and later) and 64-bit (10.5 and later). What do others think? -- Russell -- Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Graph
On Wed, Oct 6, 2010 at 2:36 PM, Waléria Antunes David
waleriantu...@gmail.com wrote:
Benjamin,
I used the 'ax.set_xscale (' log ')', but the points were even more
confused. What I need is to increase from 0.0 to 0.2 points, 0.2 to 0.4 ...
increase the size of the graph. However I do not know if the chart is well
visualized on a monitor 20''.?
Are you trying to increase the spacing in the x direction or the y
direction? Log scaling is a standard trick to achieve this effect.
And how do I let my chart like this:
http://www.supernova.lbl.gov/PDFs/SCP2003SNeCMBClust.pdf
This graph format with vertical line on, something like that.
Are you asking how to add a vertical line to your graph, or how to have only
the vertical grid lines?
Ben Root
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Re: [Matplotlib-users] New Mac binary installer for Python 2.6; do we bother with Python 2.5?
Russell E. Owen wrote: For now it is available here: http://www.astro.washington.edu/users/rowen/python/ though I hope it will end up on the official site at some point. I have not tested the wx back end and would be grateful if somebody had time to do so. It seems to work for me on OS-X 10.5(PPC), Python.org2.6, wxPython2.8.10 I propose not having a matplotlib binary installer for Python 2.5 and getting a pair for Python 2.7 32-bit (10.3.9 and later) and 64-bit (10.5 and later). What do others think? I think that's fine -- look to the future -- 2.6 is now getting pretty old, and there is 2.7 and 3.1 to work with. Thanks for all your work on this. -Chris -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/ORR(206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception chris.bar...@noaa.gov -- Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Issue with Redrawing a Line (numpy.ndarray, set_ydata, and draw)
On Wed, Oct 6, 2010 at 1:06 PM, Michael Cracraft michael.cracr...@gmail.com wrote: I have a code that continuously modifies a numpy.ndarray variable. Then, I use set_ydata on the matplotlib.lines.Line2D object to the same ndarray variable. Then, I call fig.canvas.draw() to redraw the figure, where fig is Figure object. However, the line on the graph never changes. I print a few entries to the console to make sure that the variable is changing. It seems like the only way I can get the line to update is to create a completely new ndarray, update that variable with the new values and use set_ydata on my line object. Then, the redraw works. Other things that I tried that didn't seem to work were: L1.set_ydata(x[:]) L1.set_ydata(x.tolist()) L1.set_ydata(list(x)) where L1 is my line object, and x is my ndarray. To make it redraw I have to do something like this. xnew = numpy.zeros(numpy.size(x,0)) for k in range(numpy.size(x,0)): xnew[k] = x[k] L1.set_ydata(xnew) fig.canvas.draw() Is there some switch I can set to force a redraw of the elements? I feel like I am missing something fundamental. Thanks, Michael Michael, Which version of matplotlib are you using? Which backend are you using? Also, could you include a small script or two that demonstrate the problem? This way, we can poke around with it and see what is up. Ben Root -- Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Issue with Redrawing a Line (numpy.ndarray, set_ydata, and draw)
I believe that you're using older version of mpl (1.0) and this is a known issues, which has been fixed. http://sourceforge.net/tracker/?func=detailaid=2917758group_id=80706atid=560720 Try to add L1.recache() after set_ydata. Regards, -JJ On Thu, Oct 7, 2010 at 3:06 AM, Michael Cracraft michael.cracr...@gmail.com wrote: I have a code that continuously modifies a numpy.ndarray variable. Then, I use set_ydata on the matplotlib.lines.Line2D object to the same ndarray variable. Then, I call fig.canvas.draw() to redraw the figure, where fig is Figure object. However, the line on the graph never changes. I print a few entries to the console to make sure that the variable is changing. It seems like the only way I can get the line to update is to create a completely new ndarray, update that variable with the new values and use set_ydata on my line object. Then, the redraw works. Other things that I tried that didn't seem to work were: L1.set_ydata(x[:]) L1.set_ydata(x.tolist()) L1.set_ydata(list(x)) where L1 is my line object, and x is my ndarray. To make it redraw I have to do something like this. xnew = numpy.zeros(numpy.size(x,0)) for k in range(numpy.size(x,0)): xnew[k] = x[k] L1.set_ydata(xnew) fig.canvas.draw() Is there some switch I can set to force a redraw of the elements? I feel like I am missing something fundamental. Thanks, Michael -- _ -- Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Issue with Redrawing a Line (numpy.ndarray, set_ydata, and draw)
I am running python 2.6.4 and matplotlib 0.99.1.1. I was using the TkAgg backend with my original problem, but I tried GTKAgg with the same result. Here are two sample codes. One works and the other does not. This one works ... plt.ion() x = np.arange(0,2*np.pi,0.01) y = np.sin(x) line, = plt.plot(x,y) for i in np.arange(1,200): y = np.sin(x + i/10.0) line.set_ydata(y) plt.draw() This one does not ... plt.ion() x = np.arange(0,2*np.pi,0.01) y = np.sin(x) line, = plt.plot(x,y) for i in np.arange(1,200): for k in range(len(x)): y[k] = np.sin(x[k] + i/10.0) line.set_ydata(y) plt.draw() The only real difference is that I do not get a new ndarray instance in the second one. My guess was that there was something to do with the object being the same instance as before causing some issue when I updated the ydata. On Wed, Oct 6, 2010 at 7:56 PM, Benjamin Root ben.r...@ou.edu wrote: On Wed, Oct 6, 2010 at 1:06 PM, Michael Cracraft michael.cracr...@gmail.com wrote: I have a code that continuously modifies a numpy.ndarray variable. Then, I use set_ydata on the matplotlib.lines.Line2D object to the same ndarray variable. Then, I call fig.canvas.draw() to redraw the figure, where fig is Figure object. However, the line on the graph never changes. I print a few entries to the console to make sure that the variable is changing. It seems like the only way I can get the line to update is to create a completely new ndarray, update that variable with the new values and use set_ydata on my line object. Then, the redraw works. Other things that I tried that didn't seem to work were: L1.set_ydata(x[:]) L1.set_ydata(x.tolist()) L1.set_ydata(list(x)) where L1 is my line object, and x is my ndarray. To make it redraw I have to do something like this. xnew = numpy.zeros(numpy.size(x,0)) for k in range(numpy.size(x,0)): xnew[k] = x[k] L1.set_ydata(xnew) fig.canvas.draw() Is there some switch I can set to force a redraw of the elements? I feel like I am missing something fundamental. Thanks, Michael Michael, Which version of matplotlib are you using? Which backend are you using? Also, could you include a small script or two that demonstrate the problem? This way, we can poke around with it and see what is up. Ben Root -- _ -- Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Issue with Redrawing a Line (numpy.ndarray, set_ydata, and draw)
You are correct about the version. I was just working with the version installed on Fedora 13, and the recache works. Looks like a working solution for now. Thanks, Michael On Wed, Oct 6, 2010 at 8:18 PM, Jae-Joon Lee lee.j.j...@gmail.com wrote: I believe that you're using older version of mpl (1.0) and this is a known issues, which has been fixed. http://sourceforge.net/tracker/?func=detailaid=2917758group_id=80706atid=560720 Try to add L1.recache() after set_ydata. Regards, -JJ On Thu, Oct 7, 2010 at 3:06 AM, Michael Cracraft michael.cracr...@gmail.com wrote: I have a code that continuously modifies a numpy.ndarray variable. Then, I use set_ydata on the matplotlib.lines.Line2D object to the same ndarray variable. Then, I call fig.canvas.draw() to redraw the figure, where fig is Figure object. However, the line on the graph never changes. I print a few entries to the console to make sure that the variable is changing. It seems like the only way I can get the line to update is to create a completely new ndarray, update that variable with the new values and use set_ydata on my line object. Then, the redraw works. Other things that I tried that didn't seem to work were: L1.set_ydata(x[:]) L1.set_ydata(x.tolist()) L1.set_ydata(list(x)) where L1 is my line object, and x is my ndarray. To make it redraw I have to do something like this. xnew = numpy.zeros(numpy.size(x,0)) for k in range(numpy.size(x,0)): xnew[k] = x[k] L1.set_ydata(xnew) fig.canvas.draw() Is there some switch I can set to force a redraw of the elements? I feel like I am missing something fundamental. Thanks, Michael -- _ -- Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- _ -- Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] matplotlib server side with pdf backend
The pdf backend rely on the tell method of a given file object,
which (I think) is not supported by stdout.
As a workaround, you may use StringIO.
from cStringIO import StringIO
outs = StringIO()
plt.savefig(outs, format='pdf')
print os.getvalue()
Regards,
-JJ
On Fri, Oct 1, 2010 at 8:59 PM, damiano michael
damiano-mich...@wanadoo.fr wrote:
hi !
i would like to write a server side python script that generate .pdf
documents.
for the moment i have Python 2.7 installed server side
and matplolib installed server side too.
A simple script that create a simple plot and generate a .png picture
works.
this is the script i use :
#---
# to access standard output :
import sys
# select a non-GUI backend :
import matplotlib
matplotlib.use('Agg')
#matplotlib.use(cairo.pdf)
#matplotlib.use('PDF')
# import plotting module :
import matplotlib.pyplot as plt
# generate the plot :
plt.plot([1,2,3,2,3,4])
# print the content type (what's the data type)
# the new line is embedded, using '\n' notation :
print Content-Type: image/png\n
# print Content-Type: image/PDF\n
# print Content-type: application/pdf
# output directly to webserver, as a png file
:
plt.savefig(sys.stdout, format='png')
# plt.savefig(sys.stdout, format='PDF')
# plt.savefig( test.pdf, format='pdf' )
#---
I am wondering how to do the same thing but with sending a pdf file
instead of
a png picture. (the # are for all the things i tried)
Does someone know ?
thanks.
jean-claude
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Re: [Matplotlib-users] Scatter Plot with different colors
On Tue, Oct 5, 2010 at 11:07 PM, Alessio Civ viandant...@gmail.com wrote:
Hi,
I'm trying to make a scatter plot of 2 variables using a thirds as filter to
have different colors.
Let's say I have those data:
x=1,2,3,4
y=2,3,4,5
z=0,1,0,1
Then I want the values of x and y corresponding to those of z=0 to be of a
color and those corresponding to z=1 to be of another color.
This is the code I manage to do until know:
import xlrd
import numpy as np
import matplotlib.pyplot as plt
wb = xlrd.open_workbook('GBL2009.xls')
sh = wb.sheet_by_index(0)
def column_pos():
first_row=sh.row_values(0)
net_p=
for i in first_row:
if i=='net_price':
net_p=first_row.index(i) #In gets the column position
for i in first_row:
if i=='material':
mat_p=first_row.index(i) #In gets the column position
for i in first_row:
if i=='qty':
qty_p=first_row.index(i) #In gets the column position
print net_p, mat_p, qty_p
#filtering(net_p, mat_p, qty_p)
test(net_p, mat_p, qty_p)
def test(net_p, mat_p, qty_p):
list=[]
for rownum in range(sh.nrows):
if sh.cell(rownum,mat_p).value in (96433890, 96433886):
list.append(sh.row_values(rownum))
x=[]
y=[]
z=[]
for i in list:
x.append(i[qty_p])
y.append(i[net_p])
z.append(i[mat_p])
fig = plt.figure(1, figsize=(5.5,5.5))
axScatter = plt.subplot(111)
colors = ('r', 'g', 'b', 'k')
for c in colors:
axScatter.scatter(x, y, c=c, marker='s')
plt.show()
So, what is your problem?
If you want to post a code, please post a complete (but simple!) code.
If you want to map values of z to colors, a simple solution would be
to use dict.
z = [0,1,0,1]
color_map = {0:r, 1:g}
z_as_colors = map(color_map.get, z)
scatter supports colormap but it may not very useful for your case.
Regards,
-JJ
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Re: [Matplotlib-users] Issue with Redrawing a Line (numpy.ndarray, set_ydata, and draw)
On Wed, Oct 6, 2010 at 7:31 PM, Michael Cracraft michael.cracr...@gmail.com wrote: You are correct about the version. I was just working with the version installed on Fedora 13, and the recache works. Looks like a working solution for now. Thanks, Michael Just as a side note because 'tis the season for Linux upgrades... It looks like Jef Spaleta has packaged the version 1.0 of mpl for the upcoming Fedora 14 release (early Nov.). However, Ubuntu 10.10 (Maverick Meerkat) will be released in a few days with version 0.99.3. Is this because Ubuntu typically follows whatever is in the Debian repos? Ben Root -- Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Problem with set_yticklabels
With the current svn, the code works as expected. So, I guess this is an issue that has been fixed. Can you try something like below and see if this works? for tck in ax2.get_yticklabels(): tck.set_fontsize(34) Regards, -JJ On Wed, Oct 6, 2010 at 9:50 AM, Michael Lenander jerboa...@gmail.com wrote: I'm making a plot with two y axes. When I resize the font on the tick labels for the second axis, nothing happens. The same code however works fine for the first set of axes. fig = figure() ax1 = fig.add_subplot(111) plot(bias,gamma1,'k.',markersize=mrkrsize) ax1.set_ylim([0,10]) ax1.set_yticks([0,5,10]) ax1.set_yticklabels([0,5,10],fontsize=34) #Correctly sets tick label font size ax2 = ax1.twinx() plot(bias,f,'k.',markersize=mrkrsize) ax2.set_yticks([0,-2,-4,-6]) ax2.set_yticklabels([0,-2,-4,-6],fontsize=34) #Remains default size, no error message As far as I can tell this really should work, unless there is something about twinx I don't understand. Any insight would be appreciated. -- View this message in context: http://old.nabble.com/Problem-with-set_yticklabels-tp29892687p29892687.html Sent from the matplotlib - users mailing list archive at Nabble.com. -- Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] confused about behavior inside and outside ipython
I have googled around and looked through the documents, but I can't seem to find a description of the difference between running a script inside and outside ipython (using ipython --pylab). For example, I tried doing the following in a script and made it executable. #!/usr/bin/python from __future__ import print_function import matplotlib.pyplot as plt for a in xrange(0,2): print(a) plt.plot([1,2,3,4]) plt.show() In ipython, it just prints 0 and 1 and shows one figure then stops. Outside ipython, for example just running from the command line, it prints 0, shows a plot, and stops to wait for me to close the plot. Then it prints one and shows a second plot (which is the behavior I am looking for). My question is how to I get the script to behave the same (as if I ran it fro the command line) both inside and outside ipython? If it isn't possible directly, is there a way to pause execution in ipython to wait until I close the plot before showing the next? Thanks! -C -- Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
