[Matplotlib-users] colorbar() ticklabel color
Hi,
I am trying to produce a pcolor figure with a black background using
pylab.figure(facecolor = 'black')
Consequently, I need to change the tick colors and xlabel and ylabel
colors to white using
pylab.xlabel('whatever is on the xlabel', color = 'white', fontsize
= 14)
pylab.ylabel('whatever is on the ylabel', color = 'white', fontsize
= 14)
pylab.yticks(color = 'white')
pylab.xticks(color = 'white')
Up to this point, everything is OK. The next thing I need to do is
change the colors of the ticks and the ticklabels in the colorbar. I
understand that there are no simple pylab. commands which do so. I saw
in some matplotlib-users messages that one can write the following to
change the fontsize, for example:
for t in cb.ax.get_yticklabels():
t.set_fontsize(14)
I tried adding another line to this loop:
t.set_color('white')
On one hand, there is no error message during parsing or compilation. On
the other hand, nothing actually changes, i.e. the color of the
ticklabels and ticks stays black.
How does one change this property?
Amit
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Re: [Matplotlib-users] display multi languages in a string.
That is correct. Matplotlib doesn't have font substitution support -- it only ever uses a single font for each text object. You will need to use separate text objects to do this kind of multi-lingual text, unless you can find a single font with all of the glyphs. Mike On 11/24/2010 10:19 PM, honglei junan wrote: i get matplotlib from Sourceforge ,it's matplotlib-1.0.0.win32-py2.6.exe OS:Win7 ActivePython-2.6.6.15-win32-x86.msi here is the code: # -*- coding: utf-8 -*- import matplotlib.pyplot as plt plt.figure(figsize=(8,4)) a = plt.text(0.05, 0.05, uDefault Font缺省字体조선어にほんごภาษา ไทย)#multi language ,some cann't display plt.text(0.05, 0.45, uMicrosoft YaHei微软雅黑, fontproperties='Microsoft YaHei')#Chinese OK plt.text(0.05, 0.25, uLilyUPCภาษาไทย, fontproperties='LilyUPC')#Tai OK plt.xlabel(uxlabelにほん ご,fontproperties='STXihei')#Japanese ,OK plt.ylabel(uylabel조선 어,fontproperties='Malgun Gothic')#Korea,OK plt.show() C:\Python26\Lib\site-packages\matplotlib\mpl-data\matplotlibrc: font.family : sans-serif font.sans-serif : Microsoft YaHei,Malgun Gothic,LilyUPC,FangSong,YouYuan,SimHei,STKaiti,STSong,SimSun-ExtB,Webdings,Bitstream Vera Sans, Lucida Grande, Verdana, Geneva, Lucid, Arial, Helvetica, Avant Garde, sans-serif it seems if a default font doesn't have all char's in the Default Font缺省字体조선어にほんごภาษาไทย string,it won't display correctly. -- Increase Visibility of Your 3D Game App Earn a Chance To Win $500! Tap into the largest installed PC base get more eyes on your game by optimizing for Intel(R) Graphics Technology. Get started today with the Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs. http://p.sf.net/sfu/intelisp-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Increase Visibility of Your 3D Game App Earn a Chance To Win $500! Tap into the largest installed PC base get more eyes on your game by optimizing for Intel(R) Graphics Technology. Get started today with the Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs. http://p.sf.net/sfu/intelisp-dev2dev___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] small bugfix in font_manager.py
The fontManager is essentially a replacement for what fontconfig provides on many platforms -- so it's intended that the fontManager doesn't exist if the user opts to use fontconfig. However, that's still an experimental option because it hasn't been formally tested on many platforms, and, as you point out, there may still be code paths that aren't coded correctly for that option. Mike On 11/25/2010 10:34 AM, Benjamin Root wrote: On Wednesday, November 24, 2010, Daniel Hyamsdhy...@gmail.com wrote: MPL 1.0.0, OSX If USE_FONTCONFIG is turned on, the function FontProperties.get_size_in_points will sometimes fail, because it is wanting to use fontManager, which is still 'None' if USE_FONTCONFIG is on. I'm not sure if it's the proper way to fix it, but here is a small patch that works (meaning that at least the code doesn't die; I can't vouch for much else): ORIGINAL: def get_size_in_points(self):if self._size is not None: try:return float(self._size) except ValueError:passdefault_size = fontManager.get_default_size()return default_size * font_scalings.get(self._size) NEW: def get_size_in_points(self):if self._size is not None: try:return float(self._size)except ValueError: passif fontManager:default_size = fontManager.get_default_size()else: default_size = rcParams['font.size'] return default_size * font_scalings.get(self._size) -- Daniel Hyams dhy...@gmail.com I personally think that this is reasonable, as it guarantees a size value to come from somewhere. However, I am concerned about fontManager being None. If it isn't a bug for it to be None at this point, then I have to wonder where-else in the code needs a check for None? If it is a bug, then what should it be when USE_FONTCONFIG is true? Good catch Daniel. Ben Root -- Increase Visibility of Your 3D Game App Earn a Chance To Win $500! Tap into the largest installed PC base get more eyes on your game by optimizing for Intel(R) Graphics Technology. Get started today with the Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs. http://p.sf.net/sfu/intelisp-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Increase Visibility of Your 3D Game App Earn a Chance To Win $500! Tap into the largest installed PC base get more eyes on your game by optimizing for Intel(R) Graphics Technology. Get started today with the Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs. http://p.sf.net/sfu/intelisp-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] report a problem on importing pylab OR pyplot error
I think you may have an .afm font file on your system that the AFM parser in matplotlib is having trouble with. Can you use the debugger to figure out what the value of fpath is on line 578 of font_manager.py is in the traceback below? Then we could figure out what the difficult file is. Mike On 11/25/2010 08:54 PM, Daoliang Tan wrote: Dear all, I am facing a weird problem when I import pylab or pyplot modules. Right now, I can successfully import matplotlib. But after I issue the command ipython -pylab --verbose-helpful, I get the following error: = $HOME=/home/michael CONFIGDIR=/home/michael/.matplotlib matplotlib data path /usr/share/matplotlib/mpl-data loaded rc file /etc/matplotlibrc matplotlib version 0.99.3 verbose.level helpful interactive is False units is False platform is linux2 font search path ['/usr/share/matplotlib/mpl-data/fonts/ttf', '/usr/share/matplotlib/mpl-data/fonts/afm'] Traceback (most recent call last): File /usr/bin/ipython, line 28, inmodule IPython.Shell.start().mainloop() File /usr/lib/pymodules/python2.6/IPython/Shell.py, line 1241, in start return shell(user_ns = user_ns) File /usr/lib/pymodules/python2.6/IPython/Shell.py, line 1106, in __init__ shell_class=MatplotlibShell) File /usr/lib/pymodules/python2.6/IPython/Shell.py, line 73, in __init__ debug=debug,shell_class=shell_class) File /usr/lib/pymodules/python2.6/IPython/ipmaker.py, line 100, in make_IPython embedded=embedded,**kw) File /usr/lib/pymodules/python2.6/IPython/Shell.py, line 627, in __init__ user_ns,user_global_ns,b2 = self._matplotlib_config(name,user_ns,user_global_ns) File /usr/lib/pymodules/python2.6/IPython/Shell.py, line 556, in _matplotlib_config import matplotlib.pylab as pylab File /usr/lib/pymodules/python2.6/matplotlib/pylab.py, line 206, inmodule from matplotlib import mpl # pulls in most modules File /usr/lib/pymodules/python2.6/matplotlib/mpl.py, line 2, inmodule from matplotlib import axis File /usr/lib/pymodules/python2.6/matplotlib/axis.py, line 10, inmodule import matplotlib.font_manager as font_manager File /usr/lib/pymodules/python2.6/matplotlib/font_manager.py, line 1301, inmodule _rebuild() File /usr/lib/pymodules/python2.6/matplotlib/font_manager.py, line 1292, in _rebuild fontManager = FontManager() File /usr/lib/pymodules/python2.6/matplotlib/font_manager.py, line 1010, in __init__ self.afmlist = createFontList(self.afmfiles, fontext='afm') File /usr/lib/pymodules/python2.6/matplotlib/font_manager.py, line 578, in createFontList font = afm.AFM(fh) File /usr/lib/pymodules/python2.6/matplotlib/afm.py, line 303, in __init__ parse_afm(fh) File /usr/lib/pymodules/python2.6/matplotlib/afm.py, line 291, in parse_afm dcmetrics_ascii, dcmetrics_name = _parse_char_metrics(fh) File /usr/lib/pymodules/python2.6/matplotlib/afm.py, line 176, in _parse_char_metrics bbox = _to_list_of_floats(vals[3][2:]) File /usr/lib/pymodules/python2.6/matplotlib/afm.py, line 58, in _to_list_of_floats return [_to_float(val) for val in s.split()] ValueError: invalid literal for float(): uni2605 === Each time, as long as I import pylab OR pyplot, I will obtain ValueError: invalid literal for float(): uni2605. After googling a long time, I can not get an idea to address this issue. Can anyone give me some hints? My computer configuration is the following: 1. OS: debian squeeze Linux 2.6.32-5-amd64 #1 SMP Sat Oct 30 14:18:21 UTC 2010 x86_64 GNU/Linux 2. matplotlib version: 0.99.3 3. The matplotlib is installed from the debian repository. 4. no any special customization of matplotlibrc 5. import pylab will produce this error. 6. python version: 2.6.6-3 I have reinstalled these packages many times and this does not solve this issue. Thanks for your help! Daoliang -- Increase Visibility of Your 3D Game App Earn a Chance To Win $500! Tap into the largest installed PC base get more eyes on your game by optimizing for Intel(R) Graphics Technology. Get started today with the Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs. http://p.sf.net/sfu/intelisp-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Increase Visibility of Your 3D Game App Earn a Chance To Win $500! Tap into
Re: [Matplotlib-users] small bugfix in font_manager.py
Just out of curiosity, is anyone using the fontconfig way of mapping fonts? I turned it on one day, but the immediate problem was that no mathtext worked any more; so I turned it back off. Any mathtext in titles, labels, etc. just rendered as a much of seemingly random letters. And I'll tack a second question in here as well; the reason that I was playing with fontconfig is that the font cache takes a really long time to build in certain circumstances (I'm having trouble identifying exactly when)so I guess the question is...has anyone else seen this? For example, on my (2008 vintage) mac mini, a complete rebuild of the font cache takes around 3 seconds, which is fine. On a macbook pro (tested on three different machines so far), it takes 30 seconds. This makes no sense at all to me, so any insights welcome :) I initially thought that perhaps the other users had a ton more fonts than I, but I don't think so...if I remember correctly, their font cache on the macbook pro ended up being smaller than mine on the mini. On Mon, Nov 29, 2010 at 10:10 AM, Michael Droettboom md...@stsci.eduwrote: The fontManager is essentially a replacement for what fontconfig provides on many platforms -- so it's intended that the fontManager doesn't exist if the user opts to use fontconfig. However, that's still an experimental option because it hasn't been formally tested on many platforms, and, as you point out, there may still be code paths that aren't coded correctly for that option. Mike On 11/25/2010 10:34 AM, Benjamin Root wrote: On Wednesday, November 24, 2010, Daniel Hyamsdhy...@gmail.com wrote: MPL 1.0.0, OSX If USE_FONTCONFIG is turned on, the function FontProperties.get_size_in_points will sometimes fail, because it is wanting to use fontManager, which is still 'None' if USE_FONTCONFIG is on. I'm not sure if it's the proper way to fix it, but here is a small patch that works (meaning that at least the code doesn't die; I can't vouch for much else): ORIGINAL: def get_size_in_points(self):if self._size is not None: try:return float(self._size) except ValueError:passdefault_size = fontManager.get_default_size()return default_size * font_scalings.get(self._size) NEW: def get_size_in_points(self):if self._size is not None: try:return float(self._size)except ValueError: passif fontManager:default_size = fontManager.get_default_size()else: default_size = rcParams['font.size'] return default_size * font_scalings.get(self._size) -- Daniel Hyams dhy...@gmail.com I personally think that this is reasonable, as it guarantees a size value to come from somewhere. However, I am concerned about fontManager being None. If it isn't a bug for it to be None at this point, then I have to wonder where-else in the code needs a check for None? If it is a bug, then what should it be when USE_FONTCONFIG is true? Good catch Daniel. Ben Root -- Increase Visibility of Your 3D Game App Earn a Chance To Win $500! Tap into the largest installed PC base get more eyes on your game by optimizing for Intel(R) Graphics Technology. Get started today with the Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs. http://p.sf.net/sfu/intelisp-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Increase Visibility of Your 3D Game App Earn a Chance To Win $500! Tap into the largest installed PC base get more eyes on your game by optimizing for Intel(R) Graphics Technology. Get started today with the Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs. http://p.sf.net/sfu/intelisp-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Daniel Hyams dhy...@gmail.com -- Increase Visibility of Your 3D Game App Earn a Chance To Win $500! Tap into the largest installed PC base get more eyes on your game by optimizing for Intel(R) Graphics Technology. Get started today with the Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs. http://p.sf.net/sfu/intelisp-dev2dev___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] small bugfix in font_manager.py
On 11/29/2010 10:52 AM, Daniel Hyams wrote: Just out of curiosity, is anyone using the fontconfig way of mapping fonts? I turned it on one day, but the immediate problem was that no mathtext worked any more; so I turned it back off. Any mathtext in titles, labels, etc. just rendered as a much of seemingly random letters. That's one of the drawbacks of the fontconfig mode -- probably the main reason it isn't turned on by default. fontconfig only looks in system-standard locations for fonts (by default), and matplotlib installs its special math fonts in a different place. fontconfig provides a C-level API to add another search directory, but it would have to be wrapped for Python. And I'll tack a second question in here as well; the reason that I was playing with fontconfig is that the font cache takes a really long time to build in certain circumstances (I'm having trouble identifying exactly when)so I guess the question is...has anyone else seen this? For example, on my (2008 vintage) mac mini, a complete rebuild of the font cache takes around 3 seconds, which is fine. On a macbook pro (tested on three different machines so far), it takes 30 seconds. This makes no sense at all to me, so any insights welcome :) It's dependent on a) how many fonts you have installed and b) the performance of the file system they are on. On my Linux machine with a number of network shares involved, it can take a very long time. I initially thought that perhaps the other users had a ton more fonts than I, but I don't think so...if I remember correctly, their font cache on the macbook pro ended up being smaller than mine on the mini. It's hard to say what might be causing this. However, why are you concerned about it, since the cache only has to be built once? (After all, that is the point of an on-disk font cache in the first place...) Mike On Mon, Nov 29, 2010 at 10:10 AM, Michael Droettboom md...@stsci.edu mailto:md...@stsci.edu wrote: The fontManager is essentially a replacement for what fontconfig provides on many platforms -- so it's intended that the fontManager doesn't exist if the user opts to use fontconfig. However, that's still an experimental option because it hasn't been formally tested on many platforms, and, as you point out, there may still be code paths that aren't coded correctly for that option. Mike On 11/25/2010 10:34 AM, Benjamin Root wrote: On Wednesday, November 24, 2010, Daniel Hyamsdhy...@gmail.com mailto:dhy...@gmail.com wrote: MPL 1.0.0, OSX If USE_FONTCONFIG is turned on, the function FontProperties.get_size_in_points will sometimes fail, because it is wanting to use fontManager, which is still 'None' if USE_FONTCONFIG is on. I'm not sure if it's the proper way to fix it, but here is a small patch that works (meaning that at least the code doesn't die; I can't vouch for much else): ORIGINAL: def get_size_in_points(self):if self._size is not None:try:return float(self._size) except ValueError:pass default_size = fontManager.get_default_size()return default_size * font_scalings.get(self._size) NEW: def get_size_in_points(self):if self._size is not None:try:return float(self._size) except ValueError: passif fontManager: default_size = fontManager.get_default_size()else: default_size = rcParams['font.size'] return default_size * font_scalings.get(self._size) -- Daniel Hyams dhy...@gmail.com mailto:dhy...@gmail.com I personally think that this is reasonable, as it guarantees a size value to come from somewhere. However, I am concerned about fontManager being None. If it isn't a bug for it to be None at this point, then I have to wonder where-else in the code needs a check for None? If it is a bug, then what should it be when USE_FONTCONFIG is true? Good catch Daniel. Ben Root -- Increase Visibility of Your 3D Game App Earn a Chance To Win $500! Tap into the largest installed PC base get more eyes on your game by optimizing for Intel(R) Graphics Technology. Get started today with the Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs. http://p.sf.net/sfu/intelisp-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net mailto:Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] display each images from a directory
Hello All,
i'm tring to write python code to display images from a directory .. but i'm
not able to learn how to use the matplotlib events
to handle how the images will be displaied.
simpli i need to pass to the code the path to directory where i have several
tiff files and disply them one at time using a key event.
to display a single image i'm using somethin like :
#!/usr/bin/env python
from pylab import *
try:
import Image
except ImportError, exc:
raise SystemExit(PIL must be installed to run this example)
import glob
def dispimg(input):
image = Image.open(input)
im = imshow(image, origin='lower')
show()
###
i tried to define a key action like :
def onpress(event):
if event.key=='a':
fig.canvas.draw()
# and set my directory with :
fig = figure()
fig.canvas.mpl_connect('key_press_event', onpress)
TIFFS = glob.glob(/home/habcam/habcamdata/20100820_1840/*.tif)
print num TIFFS %d % len(TIFFS)
##
but i'm not able to learn how to plot them and update the displayed image using
the key bindings :
for tif in TIFFS:
print tif
show()
thanks a lot for Any help!
Massimo.
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Re: [Matplotlib-users] display each images from a directory
On Mon, Nov 29, 2010 at 1:48 PM, Massimo Di Stefano
massimodisa...@gmail.com wrote:
Hello All,
i'm tring to write python code to display images from a directory .. but
i'm not able to learn how to use the matplotlib events
to handle how the images will be displaied.
simpli i need to pass to the code the path to directory where i have
several tiff files and disply them one at time using a key event.
to display a single image i'm using somethin like :
#!/usr/bin/env python
from pylab import *
try:
import Image
except ImportError, exc:
raise SystemExit(PIL must be installed to run this example)
import glob
def dispimg(input):
image = Image.open(input)
im = imshow(image, origin='lower')
show()
###
i tried to define a key action like :
def onpress(event):
if event.key=='a':
fig.canvas.draw()
# and set my directory with :
fig = figure()
fig.canvas.mpl_connect('key_press_event', onpress)
TIFFS = glob.glob(/home/habcam/habcamdata/20100820_1840/*.tif)
print num TIFFS %d % len(TIFFS)
##
but i'm not able to learn how to plot them and update the displayed image
using the key bindings :
for tif in TIFFS:
print tif
show()
thanks a lot for Any help!
Massimo.
Massimo,
You might want to try a different approach. Instead of having a keypress
binding, why not just have a normal for-loop with a call to dispimg() and
some sort of blocking input like a wait for keypress or something? You
might even be able to do something with a while loop that checks for a 'q'
input (for quit) and then have two keys be used for forward and backwards
progression through your list of TIFFS.
Another thing to consider is just not use matplotlib at all, and just use
linux's image viewer (called eog) which you can give it the first file in
a directory, and you can use the arrow keys to move through the list of all
image files in that directory.
I hope that helps,
Ben Root
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[Matplotlib-users] adding a number of minor tick marks between major tick marks feature
Matplotlib developers, I really like using matplotlib to create quality plots, and it seems to have an option for just about everything. However, one thing that is not easy to change is the location of minor tick marks. To set major tick mark locations, one can simply use the xticks command. And now we can atleast turn on the minor tick marks with the minorticks_on() command. But, is there any way to implement something similar to xticks for minor tick marks? Even better would be a feature that allowed the user to simply specify the number of minor tick marks that are evenly spaced between the major tick marks? Thanks. --Matthew -- Increase Visibility of Your 3D Game App Earn a Chance To Win $500! Tap into the largest installed PC base get more eyes on your game by optimizing for Intel(R) Graphics Technology. Get started today with the Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs. http://p.sf.net/sfu/intelisp-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] inset_axes and polar plots
Hi everybody, I'm trying to insert polar axes into another axis. I need to place many windrose-like plots (bar plots in a polar axis) inside an xy plot. I need them to move while panning the xy plot. To do so, I tried with inset_axes, but I cannot force the new axis to be polar. Or is there a better way to to it ? Here is the code: #!/usr/bin/python import matplotlib.pyplot as plt import numpy as np import mpl_toolkits.axes_grid1.inset_locator as iloc angleStart = 0.75 angleEnd = 2.5 ringOutterLimit = 0.95 ringWidth = 0.4 lineWidth = 1 values = np.array([0., 0.3, 0.95, 0.5, 0.1]) # Figure and main axis fig = plt.figure(figsize=(5,5)) ax1 = fig.add_subplot(111) ax1.plot([0,1], [0,1]) ax1.set_aspect(1.) # Second axis ax2 = iloc.inset_axes(ax1, width=100%, height=100%, loc=3, bbox_to_anchor=(0.3, 0.5, 0.1, 0.1), bbox_transform=ax1.transData) bars = ax2.bar([np.pi/2., np.pi], [0.5, 0.2], width=.1*np.pi) # Third axis ax3 = iloc.inset_axes(ax1, width=100%, height=100%, loc=3, bbox_to_anchor=(0.5, 0.7, 0.1, 0.1), bbox_transform=ax1.transData) bars = ax3.bar([np.pi/2., np.pi/4.], [0.1, 0.4], width=.1*np.pi) plt.show() Thanks a lot, Pascal -- Increase Visibility of Your 3D Game App Earn a Chance To Win $500! Tap into the largest installed PC base get more eyes on your game by optimizing for Intel(R) Graphics Technology. Get started today with the Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs. http://p.sf.net/sfu/intelisp-dev2dev___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
