matplotlib-users Mailing List for matplotlib

Googled, looked for documentation, even tried the source code but couldn't
find it.
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On Sat, Sep 13, 2008 at 4:35 AM, sa6113 <s.p...@gm...> wrote:
>
> I want to set all font system to my texts, but I can't set all the fonts. I
> am using this code:
>
> font = FontProperties( size='small' ,fname = 'Tahoma' )
> self.ax.legend( line, label, legend , prop = font )
>
> It raises this error :
> font = FT2Font(str(fname))
> RuntimeError: Could not open facefile Tahoma; Cannot_Open_Resource
>
> Should I add a font family for that before? How?
I doubt that "Tahoma" is the filename, which is what the fname
argument is looking for. You need to pass a full path (eg a file
ending in .ttf' if you want to explicitly set the font. Eg::
 import matplotlib.font_manager as fm
 import matplotlib.pyplot as plt
 fig = plt.figure()
 ax = fig.add_subplot(111)
 ax.plot([1,2,3], label='test')
 ax.legend(prop=fm.FontProperties(fname='c:/windows/fonts/tahoma.ttf'))
 plt.show()
But usually you would rather set the font family properties globally,
for example using the rc params setting as in the following::
 from matplotlib import rcParams
 rcParams['font.sans-serif'] = ['Tahoma']
 import matplotlib.pyplot as plt
 fig = plt.figure()
 ax = fig.add_subplot(111)
 ax.plot([1,2,3], label='test')
 ax.legend()
 plt.show()
When you run the scripts, you can pass --verbose-debug to the command
line to get additional information about what fonts are being loaded,
eg
 C:\> c:/python25/python font_family.py --verbose-debug
JDH

On Sat, Sep 13, 2008 at 12:03 AM, Marshall Tappen <mt...@ee...> wrote:
> I am having problems with the WxAgg backend on the Mac not updating
> figures. Using this test code:
> for i in xrange(250,len(x),25):
> h.set_data(x[:i],y[:i])
> axis([0,6*pi,-2,2])
> draw()
> time.sleep(0.5)
> print i
>
> Nothing changes until the script finishes. I've tried both 0.91.2 and
Hi Marshall,
this mode of animation is very brittle and usually only works with
tkagg, if at all. I have been trying to update all the animation
examples in examples/anim to reflect better usage patterns, but I
noticed that some of these were broken too. I just patched them -- I
am no wx expert so there may be better idioms, but I'm attaching the
four here
* simple_idle_wx.py - use the wx idle handler
* simple_timer_wx.py - use the wx timer
* animation_blit_wx.py - use selective artist drawing for faster animations
* dynamic_image_wxagg2.py - animation with mpl embedded in a custom wx app
Hope these help!
JDH

Jeremy Conlin wrote:
>
>
> On Fri, Sep 12, 2008 at 4:31 PM, Jeff Whitaker <js...@fa... 
> <mailto:js...@fa...>> wrote:
>
> Jeremy Conlin wrote:
>
> First question:
> I know I can do pylab.loglog() to get a log-log plot. I would
> like to create a log-linear plot. How can I do this?
>
>
> semilogx or semilogy:
>
>
>
> semilogy
> <http://matplotlib.sourceforge.net/matplotlib.pyplot.html#-semilogy>(*args,
> **kwargs)
>
> Make a plot with log scaling on the *y* axis.
>
>
> Second question:
> I would like to plot two sequences on the same figure with two
> different y-scales, one scale shown on the left and one scale
> shown on the right. How can I do this?
>
>
> twiny:
>
>
> ax = twiny
> 
> <http://matplotlib.sourceforge.net/matplotlib.axes.html#Axes-twiny>()
> create a twin of Axes
> <http://matplotlib.sourceforge.net/matplotlib.axes.html#Axes>
> for generating a plot with a shared
> y-axis but independent x axis. The x-axis of self will have
> ticks on bottom and the returned axes will have ticks on the
> top
>
> -Jeff
>
>
> Thanks for that information, that is what I needed. But now I come up 
> with a separate problem. I have the following in my code:
>
> pylab.plot(n, S, 'b.', label='x')
> pylab.legend()
> ax2 = pylab.twinx()
> pylab.plot(n, mean, 'r',label="mean")
> ax2.yaxis.tick_right()
> pylab.legend()
>
> Both plots are shown with the appropriate axes, but only the second 
> plot is listed in the legend. If I only have the first, then only the 
> first plot will be listed. Please help.
>
> Jeremy 
Jeremy: The problem is that the legends are plotting on top of each 
other. Try using 'loc=1' for the first one and 'loc=2' for the second one.
-Jeff
-- 
Jeffrey S. Whitaker Phone : (303)497-6313
NOAA/OAR/CDC R/PSD1 FAX : (303)497-6449
325 Broadway Boulder, CO, USA 80305-3328

I want to set all font system to my texts, but I can't set all the fonts. I
am using this code:
font = FontProperties( size='small' ,fname = 'Tahoma' )
self.ax.legend( line, label, legend , prop = font )
It raises this error :
font = FT2Font(str(fname))
RuntimeError: Could not open facefile Tahoma; Cannot_Open_Resource
Should I add a font family for that before? How?
-- 
View this message in context: http://www.nabble.com/set-font-problem.-tp19468970p19468970.html
Sent from the matplotlib - users mailing list archive at Nabble.com.

Hello,
I am having problems with the WxAgg backend on the Mac not updating
figures. Using this test code:
import time
from pylab import *
x = linspace(0,6*pi,255)
y = sin(x)
h,=plot([0],[0],'g-')
show()
for i in xrange(250,len(x),25):
 h.set_data(x[:i],y[:i])
 axis([0,6*pi,-2,2])
 draw()
 time.sleep(0.5)
 print i
Nothing changes until the script finishes. I've tried both 0.91.2 and
0.98. I don't seem to have these problems under Linux. Is there a
standard fix that I am missing? (The animation simple_anim_wx.py
didn't work for me either).
Thanks,
Marshall

On Fri, Sep 12, 2008 at 4:31 PM, Jeff Whitaker <js...@fa...> wrote:
> Jeremy Conlin wrote:
>
>> First question:
>> I know I can do pylab.loglog() to get a log-log plot. I would like to
>> create a log-linear plot. How can I do this?
>>
>
> semilogx or semilogy:
>
>
>
> semilogy <
> http://matplotlib.sourceforge.net/matplotlib.pyplot.html#-semilogy>(*args,
> **kwargs)
>
> Make a plot with log scaling on the *y* axis.
>
>>
>> Second question:
>> I would like to plot two sequences on the same figure with two different
>> y-scales, one scale shown on the left and one scale shown on the right. How
>> can I do this?
>>
>
> twiny:
>
>
> ax = twiny
> <http://matplotlib.sourceforge.net/matplotlib.axes.html#Axes-twiny>()
> create a twin of Axes
> <http://matplotlib.sourceforge.net/matplotlib.axes.html#Axes> for
> generating a plot with a shared
> y-axis but independent x axis. The x-axis of self will have
> ticks on bottom and the returned axes will have ticks on the
> top
>
> -Jeff
>
>>
Thanks for that information, that is what I needed. But now I come up with
a separate problem. I have the following in my code:
 pylab.plot(n, S, 'b.', label='x')
 pylab.legend()
 ax2 = pylab.twinx()
 pylab.plot(n, mean, 'r',label="mean")
 ax2.yaxis.tick_right()
 pylab.legend()
Both plots are shown with the appropriate axes, but only the second plot is
listed in the legend. If I only have the first, then only the first plot
will be listed. Please help.
Jeremy