matplotlib-users Mailing List for matplotlib

On 2007年1月24日, Fernando Perez apparently wrote: 
> Let us know if this is not enough or if you have any other issues. 
How about for Windows users? You list as dependencies:
# PyWin32 from http://starship.python.net/crew/mhammond
 But that link is broken. Can we just use 
 pywin32-210.win32-py2.5.exe from 
 http://sourceforge.net/projects/pywin32/ ?
# CTypes from http://starship.python.net/crew/theller/ctypes 
 But that should not apply to Python 2.5+, right?
# PyReadline for Windows from 
http://projects.scipy.org/ipython/ipython/wiki/PyReadline/Intro
 But the correct link now seems to be
 http://ipython.scipy.org/moin/PyReadline/Intro
 and the binary installer instructions there are Python 
 2.4 specific. (I assume they translate directly to 2.5.)
So I installed PyWin32 as above, and PyReadline. I do NOT 
see IPython in my Start Menu nor when I look at 
Install/Uninstall programs. I do see an IPython folder in 
Lib/site-packages, so I guessed I should call Shell.py, but 
this is either a bad guess or IPython is failing: I briefly
see a shell labelled IPython flash on screen and disappear.
Thank you,
Alan Isaac
PS I did copy pyreadlineconfig.ini from pyreadline-egg/pyreadline/config to 
my homedir.

I found an example script I got to work for WX. I
guessed that the ws.app had to be deleted to plot
again. Here it is (the part that runs the code and
creates the WX.app:
if __name__ == '__main__':
 app = wx.PySimpleApp(0)
 frame = PlotFigure()
 frame.plot_data()
 frame.Show()
 app.MainLoop()
 #must delete app before reusing for wxPython
 del app # <<---- THE CRUCIAL STEP
 print "done with plot 1"
 
 app = wx.PySimpleApp(0)
 frame = PlotFigure()
 frame.plot_data()
 frame.Show()
 app.MainLoop()
 print "done with plot 2"
Without the delete you get a crash/hang.
 
-- Lou Pecora
 My views are my own.
 
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Jan Winter wrote:
> hi,
> 
> I use python 2.4, matplotlib and WXpython on OS X.
> 
> I plot and show something and every thing works fine (the plot is 
> shown in the python.app).
> I close the plot window.
> I plot another thing.
> It is shown again with python.app, but now python.app crashes...
I'm not sure pylab supports this use. I think once you close the plot 
window, you have shut down the wx.App, then when you plot again, it 
tries to create it again, but you can't start and stop wx.Apps over 
again in the same process.
I think you can do what you want by using ipython, so that you don't 
have to close the figure window to get your prompt back.
-Chris
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Are you running the script again or plotting a second
time in the same script? You might need to set
matplotlib to plot interactively. See the
documentaion about interactive plotting. You need to
set the back end graphics to the right kind for
interactive plotting.
E.g. in .matplotlibrc
backend : TKAgg # should work for
interactive
interactive : True # see
http://matplotlib.sourceforge.net/interactive.html
-- Lou Pecora
 My views are my own.
 
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Jan,
What versions of wxPython and matplotlib are you using?
Ken

On Tuesday 23 January 2007 20:09, bernski wrote:
> I am getting a dvipng version error when I run:
>
> import Numeric,matplotlib
> matplotlib.use('Agg')
> from matplotlib import rc
> rc('text', usetex=True)
> import pylab
>
> pylab.figure(num=1,figsize=(6,4))
> pylab.plot(Numeric.arange(10), Numeric.arange(10)**2)
> pylab.axis( (0,9,0,81) )
> pylab.xlabel(r'$width$')
> pylab.ylabel(r'$Height (km)$')
>
> filename='c:/test.png'
> pylab.savefig(filename,dpi=100)
> pylab.clf()
>
> here is a bit of the error message:
>
> File "C:\Python24\Lib\site-packages\matplotlib\texmanager.py", line 58, in
> get_dvipng_version
> raise RuntimeError('Could not obtain dvipng version')
> RuntimeError: Could not obtain dvipng version
>
> I have winXP, python2.4, matplotlib0.87, miktex2.5. I downloaded
> dvipng1.9 from sourceforge, but have no idea what to do with it. do i need
> a 'c' compiler to install it?
See http://www.scipy.org/Cookbook/Matplotlib/UsingTex for information about 
package requirements and configuration. If you can't get dvipng through 
MikTeX, and the sourceforge page doesnt distribute a windows executable, then 
you will have to compile it.
Darren

>>>>> "Samuel" == Samuel M Smith <sm...@sa...> writes:
 Samuel> I have the same problem
Did you notice my response then? 
 John> This is a bug -- thanks for reporting it. I just committed
 John> changes to svn to fix it.
Ie, it is a bug that is fixed and you must use the svn version of
matplotlib .....
JDH

I'd be happy to be shown wrong, but it seems the current
incarnation of boxplot cannot do this. 
 
The current syntax is:
 
boxplot(x, notch=0, sym='+', vert=1, whis=1.5,
 positions=None, widths=None)
 
What it *could* have to support what is needed is
an extra parameter:
boxplot(x, notch=0, sym='+', vert=1, whis=1.5,
 positions=None, widths=None, percentile=False)
When percentile=True, then the program would treat 
the value of whis as a percentile value (0.001 to 100) and
plot the whiskers and outliers accordingly.
For reference, please see:
http://en.wikipedia.org/wiki/Box-and-whisker_plot 
and the section that says:
"There are alternative implementations of this detail of the 
box plot in various software packages, such as the whiskers 
extending to at most the 5th and 95th (or some more extreme) 
percentiles"
and for examples of such an implementation:
http://www.originlab.com/index.aspx?s=8&lm=214&pid=959
or
http://ploticus.sourceforge.net/doc/rangebar.html 
(see the option called "tailmode" which allows switching
between 5th and 95th percentile, min and max, or 1.5 x IQR.)
Thanks
Derek
>>> "Derek Hohls" <DH...@cs...> 2007年01月23日 03:29 PM >>>
I would like to have the extreme end of the upper whisker
on the box plot co-incide with the 98% of the data.
According to the documents:
whis (default 1.5) defines the length of the whiskers as 
a function of the inner quartile range. They extend to the 
most extreme data point within ( whis*(75%-25%) ) data range.
So, in theory, a value of whis=1.9 should be what is needed
but this seems to produce a much lower point - what value 
do I need to use?
Thanks
Derek
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Hi Samuel,
On 1/24/07, Samuel M. Smith <sm...@sa...> wrote:
> I couldn't find an answer on the iPython web site, does anyone know
> if iPython works with
> python 2.5. I assume I have to rebuild from source on OS X with
> python 2.5 installed.
> I have installed python 2.5 but when I run iPython is runs python 2.4.
Yes, ipython runs fine on python 2.5, but only as of the most recent
release, version 0.7.3, which you can get here:
http://ipython.scipy.org/moin/Download
If you have several versions of Python installed and you want to make
sure that ipython starts with 2.5, then run the code posted there as:
tar -xvzf ipython-0.7.3.tar.gz
cd ipython-0.7.3
python2.5 setup.py build
sudo python2.5 setup.py install
Let us know if this is not enough or if you have any other issues.
Cheers,
f

I couldn't find an answer on the iPython web site, does anyone know 
if iPython works with
python 2.5. I assume I have to rebuild from source on OS X with 
python 2.5 installed.
I have installed python 2.5 but when I run iPython is runs python 2.4.
**********************************************************************
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2966 Fort Hill Road
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801-768-2768 voice
801-768-2769 fax
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Hi folks,
 
 reposting... has anyone a clue that might help in the right direction??
 
 was my question too hard or would it help better if I rephrased it ?
 
 thanks so much 
 
 maser
maser rati <mas...@ya...> wrote: Hi Folks,
 
 I was wondering how to set the Matplotlib classic Toolbar in order to display only existent data when the back/forward arrows are clicked (i.e, the pan feature) for a subplot that displays plotted data. 
 
 How to set the code in the matplotlib toolbar to only display the data from the file? ( clicking the left arrow when the left most point is at the start of the data file should result in freezing of the plot and a similar action when the right arrow is clicked when the right most point is at the end of the data file). 
 
 I'm not sure if my post was sufficiently as clear as spring water. Any suggestions would be greatly appreciated.
 
 Great forum, by the way.. 
 
 Thanks.
 -Maser
 
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I have the same problem
On 09 Jan, 2007, at 15:55, John Hunter wrote:
>>>>>> "Marcel" == Marcel Oliver <m.o...@iu...> writes:
>
> Marcel> TypeError: set_ylim() got an unexpected keyword argument
> Marcel> 'xmin' WARNING: Failure executing file: <colonius.py>
>
> This is a bug -- thanks for reporting it. I just committed changes to
> svn to fix it.
>
> JDH
>
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2966 Fort Hill Road
Eagle Mountain, Utah 84005-4108
801-768-2768 voice
801-768-2769 fax
**********************************************************************
"The greatest source of failure and unhappiness in the world is
giving up what we want most for what we want at the moment"
**********************************************************************