Re: [Matplotlib-users] Ipython and python2.5
Alan G Isaac <[EMAIL PROTECTED]> writes: > 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. I installed my version from svn and to get the start menu folders etc. I had to run the win32_manual_post_install.py script. The problem with Ipython immediately closing can be because your default home directory isn't writable. To fix this set the environment variable HOME (control panel:system - Advanced Tab) to be some directory you have write access to e.g. C:\ Also either one or both of the following dlls need to be in your windows:system32 directory. mfc71.dll msvcp71.dll If you don't have them I believe they can be found on the net. HTH, Dave - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] bar charts (Margherita Vittone wiersma)
Hi, > i have made bar charts but I was wondering if there is a way to show > on top of each bar the real content/counts, like a label; I generate > static plots so the dynamic showing of the counts on focusing on the > bar does not help me. Cannot you just add the counts manually? E.g. x,y = arange(5),randn(5) bar(x,y, align='center') for i in range(5): text(x[i],y[i],'%f' % y[i], horizontalalignment='center') Cheers. -- / \ ,, _._ _ |oo| _ / \__/ \ _ ((/ () \)) / \ Yannick COPIN (o:>* Doctus cum libro |/| ( )|oo| Institut de physique nucleaire de Lyon \/ _`\ /'_/ \(IN2P3 - France) / /.-' /\<>/\ `\.( () )_._ Tel: (33/0) 472 431 968 |` / \/ \ /`'--') http://snovae.in2p3.fr/ycopin/ \__,-'`| |. |\/ |/\/\|"\"` AIM: YcCopinICQ: 236931013 jgs | |. | \___/\___/ | |. | || - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] accentued characters error, superscript error
Hi, using Agg, there's problems exporting plots in pdf format, all accentued characters are not displayed (like u'accentué'), but they are in svg files. In svg files, superscript characters are set to subscript (using TeX notation). Is there solutions to these problems? thanks -- Lionel Roubeyrie - [EMAIL PROTECTED] LIMAIR http://www.limair.asso.fr - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] object-oriented interface
> "Jonathon" == Jonathon Anderson <[EMAIL PROTECTED]> writes: Jonathon> Could someone point me to documentation of the oo Jonathon> interface? Everything seems to reference pylab (even Jonathon> examples that say they're for the oo interface). http://matplotlib.sourceforge.net/faq.html#OO and http://matplotlib.sourceforge.net/leftwich_tut.txt and examples: > ls agg_oo.py embedding_in_* agg_oo.py embedding_in_gtk.py embedding_in_tk2.py embedding_in_wx3.py embedding_in_gtk2.py embedding_in_qt4.py embedding_in_tk.py embedding_in_wx4.py embedding_in_gtk3.py embedding_in_qt.py embedding_in_wx2.py embedding_in_wx.py There is also a chapter in the User's Guide on the web site on the API JDH - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Why so different from Matlab to matplotlib (fft2 question)?
I'm trying to learn about 2D fourier transforms and k-space right now.
To do this, I'm using the image at
http://django.jayparlar.com/4kSnake.png
In Matlab, I run the following code:
Im = double(imread('4kSnake.png'));
FT = fftshift(fft2(Im));
FT_Amp = abs(FT);
minAmp = min(min(FT_Amp)); maxAmp = max(max(FT_Amp));
colormap gray;
imagesc(FT_Amp,[minAmp 0.01*maxAmp]);
and I get the result http://django.jayparlar.com/matlab.png (which is
what it should look like).
It matplotlib/ipython, I do the following:
In [53]: a = imread("4kSnake.png")
In [54]: a = double(imread("4kSnake.png"))
In [55]: FT = fftpack.fftshift(fftpack.fft2(a))
In [56]: FT_Amp = abs(FT)
In [57]: imshow(FT_Amp, cmap=cm.gray)
and I get the result http://django.jayparlar.com/matplotlib.png
Can anyone offer any insight as to why? I'm fairly new to matplotlib,
but I'm a LONG time Python user, and would much rather continue my
work in Python than Matlab.
One issue might be the use of "minAmp" and "maxAmp" in the Matlab
code, and no equivalent in the Python. I thought maybe the vmin/vmax
arguments to 'imshow' might work, but they don't make much of a
difference.
For all I know, this could be a scipy issue, and not a matplotlib one,
but I thought I'd start at the top and work my way down.
Many thanks,
Jay P.
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Re: [Matplotlib-users] Why so different from Matlab to matplotlib (fft2 question)?
> "Jay" == Jay Parlar <[EMAIL PROTECTED]> writes: Jay> One issue might be the use of "minAmp" and "maxAmp" in the Jay> Matlab code, and no equivalent in the Python. I thought maybe Jay> the vmin/vmax arguments to 'imshow' might work, but they Jay> don't make much of a difference. vmin and vmax do scale the image -- if they do not appear to make a difference you are probably choosing improper ranges. Jay> For all I know, this could be a scipy issue, and not a Jay> matplotlib one, but I thought I'd start at the top and work Jay> my way down. I suggest you start at the bottom and work your way up, and inspect the results of fftshift in matlab and scipy. imshow doesn't do all that much, so if you are seeing big differences it is more likely in my opinion that you are feeding in different values. JDH - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Sliders: only update funtion on button_release_event
Hello everyone,
I was playing around with this /examples/widgets/sliders.py and thought about
how to use it in my case. I'd like to controll a parameter which - if
changed - starts a calculation which last about some seconds. So
dragging=False would be exactly what I'm looking for! But on the other hand
I'd like to see the slider moving and the value shown altering!
A look at the code in widgets.py made me think about how to change the code to
achieve this. Here's my suggestion (my widgets.py is also attached):
docstring:
update_func_only_on_release_event : The function specified by on_changed
is normally updated on motion_notify_event if dragging is True.
However if you don't want it to get updated (because it would take
too long or whatever) but nevertheless want to see the slider moving
then set dragging=True and update_func_only_on_release_event=True.
(Therefore: dragging=False and
update_func_only_on_release_event=False makes no sense and
dragging=False makes update_func_only_on_release_event=True.)
def __init__(self, ax, label, valmin, valmax, valinit=0.5, valfmt='%1.2f',
closedmin=True, closedmax=True, slidermin=None,
slidermax=None, dragging=True,
update_func_only_on_release_event=False):
... snip ...
if dragging:
self.update_func_only_on_release_event = \
update_func_only_on_release_event
else:
self.update_func_only_on_release_event = False
... snip ...
ax.figure.canvas.mpl_connect('button_press_event', self._update)
if dragging:
ax.figure.canvas.mpl_connect('motion_notify_event', self._update)
# VVV new #
if self.update_func_only_on_release_event:
ax.figure.canvas.mpl_connect('button_release_event', self._update)
# ^^^ new #
... snip ...
def set_val(self, val, name):
self.poly.xy[-1] = val, 0
self.poly.xy[-2] = val, 1
self.valtext.set_text(self.valfmt%val)
if self.drawon: self.ax.figure.canvas.draw()
self.val = val
if not self.eventson: return
# VVV new #
if not self.update_func_only_on_release_event or \
(name == 'button_release_event' and
self.update_func_only_on_release_event):
# ^^^ new #
for cid, func in self.observers.items():
func(val)
To see what happens I altered the example/widgets/slider.py to the one also
attached.
So far so good. But I'm not really convinced by this change (are you?). I'm
not sure if a list instead of dragging and update_func_only_on_release_event
would be better. Sliders could be initialized with two lists:
update_slider_on = ['button_press_event', 'motion_notify_event']
update_func_on = ['button_release_event']
The drawback here: A lot of all possible combinations are useless!
Please let me know what you're thinking about this.
Have a nice weekend
Martin
widgets.py
Description: application/python
sliders.py
Description: application/python
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Re: [Matplotlib-users] Why so different from Matlab to matplotlib (fft2 question)?
On Friday 26 January 2007 11:14, John Hunter wrote: > > "Jay" == Jay Parlar <[EMAIL PROTECTED]> writes: > > Jay> One issue might be the use of "minAmp" and "maxAmp" in the > Jay> Matlab code, and no equivalent in the Python. I thought maybe > Jay> the vmin/vmax arguments to 'imshow' might work, but they > Jay> don't make much of a difference. > > vmin and vmax do scale the image -- if they do not appear to make a > difference you are probably choosing improper ranges. vmin and vmax dont seem to have any effect on the resulting image, at least on my machine with the most recent svn. > Jay> For all I know, this could be a scipy issue, and not a > Jay> matplotlib one, but I thought I'd start at the top and work > Jay> my way down. > > I suggest you start at the bottom and work your way up, and inspect > the results of fftshift in matlab and scipy. imshow doesn't do all > that much, so if you are seeing big differences it is more likely in > my opinion that you are feeding in different values. Aside from the ranges behaving strangely, something seems funny with the image itself. He selected the grey colormap, yet there are hints of yellow in the image. Darren - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Why so different from Matlab to matplotlib (fft2 question)?
> "Darren" == Darren Dale <[EMAIL PROTECTED]> writes: Darren> vmin and vmax dont seem to have any effect on the Darren> resulting image, at least on my machine with the most Darren> recent svn. I haven't looked at his data or the output if fftshift. if vmin and vmax do nothing, mpl is probably interpreting his image as RGB or RGBA, which it would do if the output is MxNx3 or MxNx4 and thus would not be applying scaling or color mapping. When using svn, vmin and vmax do behave as expected in my test code: In [3]: X = rand(10,10) In [4]: subplot(211) Out[4]: In [5]: imshow(X, vmin=0.45, vmax=.55) Out[5]: In [6]: subplot(212) Out[6]: In [7]: imshow(X, vmin=0.0, vmax=1) Out[7]: I don't have time to look at this closely right now but maybe this will give someone a hint... JDH - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Why so different from Matlab to matplotlib (fft2 question)?
On 1/26/07, John Hunter <[EMAIL PROTECTED]> wrote: > > "Darren" == Darren Dale <[EMAIL PROTECTED]> writes: > > Darren> vmin and vmax dont seem to have any effect on the > Darren> resulting image, at least on my machine with the most > Darren> recent svn. > > I haven't looked at his data or the output if fftshift. if vmin and > vmax do nothing, mpl is probably interpreting his image as RGB or > RGBA, which it would do if the output is MxNx3 or MxNx4 and thus would > not be applying scaling or color mapping. When using svn, vmin and > vmax do behave as expected in my test code: That's the problem, I believe. 'imread' in mpl always reads images in as MxNx4, while Matlab will check if the image is B&W and just do MxN. Is there any way to force MxN behaviour in mpl? Jay P. - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Why so different from Matlab to matplotlib (fft2 question)?
> "Jay" == Jay Parlar <[EMAIL PROTECTED]> writes: Jay> That's the problem, I believe. 'imread' in mpl always reads Jay> images in as MxNx4, while Matlab will check if the image is Jay> B&W and just do MxN. Is there any way to force MxN behaviour Jay> in mpl? No way currently, but one could modify the png reader to do it Probably easiest is to use PIL and get a grayscale numpy array out, then mpl's colormapping and normalization will work as advertised. JDH - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] pylab.psd without plot
Hello, how can I use the pylab.psd-function without a matplotlib-Plot-figure popping up? Thanks Lars -- Dipl.-Ing. Lars Friedrich Optical Measurement Technology Department of Microsystems Engineering -- IMTEK University of Freiburg Georges-Köhler-Allee 102 D-79110 Freiburg Germany phone: +49-761-203-7531 fax: +49-761-203-7537 room: 01 088 email: [EMAIL PROTECTED] - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Why so different from Matlab to matplotlib (fft2 question)?
On 1/26/07, John Hunter <[EMAIL PROTECTED]> wrote:
> > "Jay" == Jay Parlar <[EMAIL PROTECTED]> writes:
>
> Jay> That's the problem, I believe. 'imread' in mpl always reads
> Jay> images in as MxNx4, while Matlab will check if the image is
> Jay> B&W and just do MxN. Is there any way to force MxN behaviour
> Jay> in mpl?
>
> No way currently, but one could modify the png reader to do it
> Probably easiest is to use PIL and get a grayscale numpy array out,
> then mpl's colormapping and normalization will work as advertised.
Beautiful, that worked like a charm.
from PIL import Image
im = Image.open("4kSnake.png")
a = scipy.asarray(im)
ft = fftpack.fftshift(fftpack.fft2(a))
...
Perfect!
Thanks so much,
Jay P.
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Re: [Matplotlib-users] pylab.psd without plot
> "Lars" == Lars Friedrich <[EMAIL PROTECTED]> writes: Lars> Hello, how can I use the pylab.psd-function without a Lars> matplotlib-Plot-figure popping up? >From matplotlib.mlab import psd JDH - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] svg doesn't seem to honour alpha channel.
I'm trying to work out a way of printing plots as vector graphics that
use alpha channel.
I understand that postscript doesn't do alpha, so I was hoping to save
the plot as svg, import into illustrator and then save as a pdf and/or
print.
So I run the following file: (matplotlib svn 2943, os x, WXAgg back end)
from pylab import *
from numpy import *
rx, ry = 1.8, 1.
area = rx * ry * pi
theta = arange(0, 2*pi+0.01, 0.1)
verts = zip(rx/area*cos(theta), ry/area*sin(theta))
x = [0,0.1,0.2, 0.5,0.43]
y = [0.,0.1,0.,0.20,.2]
scatter(x,y, c='r', edgecolor='k', faceted=True, s=300, marker=None,
verts=verts, alpha=0.2)
y = array(y) + 0.01
scatter(x,y, c='g', edgecolor='k', faceted=True, s=300, marker=None,
verts=verts, alpha=0.2)
savefig('alpha_test.svg')
Unfortunately if I import alpha_test.svg into Illustrator or Inkscape,
the ellipses appear completely solid. Saving directly as .pdf produces
a solid image as well.
However, if I save the figure as .png, the ellipses are transparent.
I had the same problem running a slightly earlier version of
matplotlib on a Linux box with GTKAgg
Regards, George Nurser.
alpha_test.svg
Description: image/svg
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Re: [Matplotlib-users] Ipython and python2.5
On 1/25/07, Alan G Isaac <[EMAIL PROTECTED]> wrote: > On Wed, 24 Jan 2007, 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/ ? Yes, should be the same thing. > # CTypes from http://starship.python.net/crew/theller/ctypes > > But that should not apply to Python 2.5+, right? Correct, ctypes is now included. > # 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.) Yup. We obviously need to update the windows documentation... > 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. As Dave said, you may need to run the post-install script manually. The binary win32 installer does this for you because when the installer is /built/, it is told what to do as a post-install step. But a manual installation from source may require that step to be applied manually (it's been years since I wrote that code, and much of the win32 setup has been changed since by others, so take anything I say here with a big grain of salt). Cheers, f - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Floating exception when rendering ylabel()
I just installed matplotlib 0.87.5 and numpy 1.0 from source on my
Debian "sarge" (stable release) system. (I chose those versions
because they're the ones currently included in the testing "etch"
release.) Everything I've tried has worked *except* the ylabel()
command. Whenever a plot containing a ylabel is rendered (on the
screen with show() or figure(), or non-interactively with savefig()),
python exits with the error
Floating exception
This does not happen if the ylabel() command is omitted, and there is
no problem with xlabel(), so I assume the issue is rotating the text
for the y axis label.
Simple example:
==
> ipython -pylab
/usr/lib/python2.3/site-packages/numpy/ctypeslib.py:12: UserWarning: All
features of ctypes interface may not work with ctypes < 1.0.1
warnings.warn("All features of ctypes interface may not work with " \
/usr/lib/python2.3/site-packages/IPython/Shell.py:628: GtkDeprecationWarning:
gtk.timeout_add is deprecated, use gobject.timeout_add instead
self.gtk.timeout_add(self.TIMEOUT, self.on_timer)
Python 2.3.5 (#2, Oct 16 2006, 19:19:48)
Type "copyright", "credits" or "license" for more information.
IPython 0.6.13 -- An enhanced Interactive Python.
? -> Introduction to IPython's features.
%magic -> Information about IPython's 'magic' % functions.
help-> Python's own help system.
object? -> Details about 'object'. ?object also works, ?? prints more.
Welcome to pylab, a matplotlib-based Python environment.
For more information, type 'help(pylab)'.
In [1]: plot([0, 1],[0, 1])
Out[1]: []
In [2]: xlabel('foo')
Out[2]:
In [3]: ylabel('bar')
Floating exception
==
Anyone have experience with this and care to point me towards the
solution to such a problem?
Thanks,
--
==
Office: 0.17 (Golm) Dr. John T. Whelan
Phone: +49 331 567 7117 Albert-Einstein Institute
FAX: +49 331 567 7298 Am Muehlenberg 1
http://www.aei.mpg.de/~whelan/ D-14476 Potsdam
[EMAIL PROTECTED][EMAIL PROTECTED]
==
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Re: [Matplotlib-users] Floating exception when rendering ylabel()
You may be encountering this bug:
http://code.astraw.com/debian_sarge_libc.html
John T Whelan wrote:
> I just installed matplotlib 0.87.5 and numpy 1.0 from source on my
> Debian "sarge" (stable release) system. (I chose those versions
> because they're the ones currently included in the testing "etch"
> release.) Everything I've tried has worked *except* the ylabel()
> command. Whenever a plot containing a ylabel is rendered (on the
> screen with show() or figure(), or non-interactively with savefig()),
> python exits with the error
>
> Floating exception
>
> This does not happen if the ylabel() command is omitted, and there is
> no problem with xlabel(), so I assume the issue is rotating the text
> for the y axis label.
>
> Simple example:
>
> ==
>
>> ipython -pylab
>>
> /usr/lib/python2.3/site-packages/numpy/ctypeslib.py:12: UserWarning: All
> features of ctypes interface may not work with ctypes < 1.0.1
>warnings.warn("All features of ctypes interface may not work with " \
> /usr/lib/python2.3/site-packages/IPython/Shell.py:628: GtkDeprecationWarning:
> gtk.timeout_add is deprecated, use gobject.timeout_add instead
>self.gtk.timeout_add(self.TIMEOUT, self.on_timer)
> Python 2.3.5 (#2, Oct 16 2006, 19:19:48)
> Type "copyright", "credits" or "license" for more information.
>
> IPython 0.6.13 -- An enhanced Interactive Python.
> ? -> Introduction to IPython's features.
> %magic -> Information about IPython's 'magic' % functions.
> help-> Python's own help system.
> object? -> Details about 'object'. ?object also works, ?? prints more.
>
>Welcome to pylab, a matplotlib-based Python environment.
>For more information, type 'help(pylab)'.
>
> In [1]: plot([0, 1],[0, 1])
> Out[1]: []
>
> In [2]: xlabel('foo')
> Out[2]:
>
> In [3]: ylabel('bar')
> Floating exception
> ==
>
> Anyone have experience with this and care to point me towards the
> solution to such a problem?
> Thanks,
>
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