matplotlib-users Mailing List for matplotlib

All,
I'm trying to use the Cocoa backend on Snow Leopard, using r7791 (GCC 
4.2.1 / Python 2.6.1 from Apple, 64b)
Unfortunately, a simple `plot(range(10),range(10))` gives me an empty 
window and error message as such:
Python[53010:d07] Inconsistent set of values to create NSBitmapImageRep
/Users/pierregm/.local/lib/python2.6/site-packages/matplotlib/backends/ 
backend_cocoaagg.py:140: UninitializedDeallocWarning: leaking an 
uninitialized object of type NSBitmapImageRep
 32) # bits per pixel
Can anybody reproduce it ? Would anybody have some ideas on how to fix 
that ?
Thx a lot in advance.
P.
FYI, the build log can be accessed at: http://pastebin.com/d5b3c1838

starting with 
ipython -pylab 
solves it... 
thanks for the help! 
Thomas Hrabe wrote:
> 
> Hi all,
> 
> I am a beginner with matplotlib and doing my first steps with python
> plotting.
> However, I learned that pyplot.show really forces the display of already
> existing plots.
> 
> For instance, when I type 
> In[2]: pyplot.plot([1,2,3])
> Out[2]: [<matplotlib.lines.Line2D object at 0x2e33850>] 
> 
> nothing happens until I type
> 
> In[3]: pyplot.show()
> 
> After that, the interpreter halts until I close the new figure window.
> Only closing enables the interpreter to continue with my later input.
> Moreover, typing 
> In[4]: pyplot.plot([1,2,3])
> 
> again would display the figure immediately. Seems the gtk engine or
> something else must be started up by pyplot.show once and, once running,
> it displays everything else after that instantly.
> How can I tweak pyplot in such way that it would display my figures on the
> very first pyplot.plot call without halting the input?
> 
> Thank you in advance for your help,
> Thomas
> 
> 
-- 
View this message in context: http://www.nabble.com/pyplot.show-tp25518658p25519154.html
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oops, maybe use pyplot.ion() not pyplot.ioff(). and pyplot.show() is not
needed.
just pyplot.plot(values) is enough to launch a new figure window and you can
continue plot new lines or legend... interactively.
I test it on my pc: Windows XP, Python 2.5.4, Matplotlib 0.99.0.
On Sat, Sep 19, 2009 at 1:37 PM, Thomas Hrabe <th...@go...> wrote:
> Hi,
>
>
> thank you for the quick reply. Unfortunately, none of both works for me.
>
>
> values = [1,2,3];
>
> pyplot.ioff();
>
> #pyplot.ion();
>
> print pyplot.isinteractive();
>
> pyplot.plot(values);
>
> pyplot.show();
>
> The value (True|False) of interactive mode does not make a difference to
> the plotting.
> Other suggestionst?
>
> Thanks so far!
>
> 2009年9月19日 sunqiang <sun...@gm...>
>
> may be you can try pyplot.ion()? it turns interactive mode on.
>> Hope this helps.
>> On Sat, Sep 19, 2009 at 1:11 PM, Thomas Hrabe <th...@gm...> wrote:
>>
>>>
>>> Hi all,
>>>
>>> I am a beginner with matplotlib and doing my first steps with python
>>> plotting.
>>> However, I learned that pyplot.show really forces the display of already
>>> existing plots.
>>>
>>> For instance, when I type
>>> In[2]: pyplot.plot([1,2,3])
>>> Out[2]: [<matplotlib.lines.Line2D object at 0x2e33850>]
>>>
>>> nothing happens until I type
>>>
>>> In[3]: pyplot.show()
>>>
>>> After that, the interpreter halts until I close the new figure window.
>>> Only
>>> closing enables the interpreter to continue with my later input.
>>> Moreover,
>>> typing
>>> In[4]: pyplot.plot([1,2,3])
>>>
>>> again would display the figure immediately. Seems the gtk engine or
>>> something else must be started up by pyplot.show once and, once running,
>>> it
>>> displays everything else after that instantly.
>>> How can I tweak pyplot in such way that it would display my figures on
>>> the
>>> very first pyplot.plot call without halting the input?
>>>
>>> Thank you in advance for your help,
>>> Thomas
>>>
>>> --
>>> View this message in context:
>>> http://www.nabble.com/pyplot.show-tp25518658p25518658.html
>>> Sent from the matplotlib - users mailing list archive at Nabble.com.
>>>
>>>
>>>
>>> ------------------------------------------------------------------------------
>>> Come build with us! The BlackBerry&reg; Developer Conference in SF, CA
>>> is the only developer event you need to attend this year. Jumpstart your
>>> developing skills, take BlackBerry mobile applications to market and stay
>>> ahead of the curve. Join us from November 9&#45;12, 2009. Register
>>> now&#33;
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>>> Matplotlib-users mailing list
>>> Mat...@li...
>>> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>>>
>>
>>
>

Keith Goodman wrote:
> Robert Kern recently noticed a bug in demean. The bug and the fix is here:
> 
> http://mail.scipy.org/pipermail/numpy-discussion/2009-August/044446.html
> 
Fixed. Thank you for pointing this out.
Eric
> ------------------------------------------------------------------------------
> Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day 
> trial. Simplify your report design, integration and deployment - and focus on 
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Running IPython with -pylab or specifying the threading option?
See more at
http://ipython.scipy.org/doc/stable/html/interactive/reference.html?highlight=pylab
On Sat, Sep 19, 2009 at 12:42 AM, Thomas Hrabe <th...@gm...> wrote:
>
> Hi,
>
> thank you for the quick reply. Unfortunately, none of both works for me.
>
> values = [1,2,3];
> pyplot.ioff();
> #pyplot.ion();
> print pyplot.isinteractive();
> pyplot.plot(values);
> pyplot.show();
>
> The value (True|False) of interactive mode does not make a difference to
> the
> plotting.
> Other suggestionst?
>
> Thanks so far!
>
>
> >may be you can try pyplot.ion()? it turns interactive mode on.
> >Hope this helps.
> >On Sat, Sep 19, 2009 at 1:11 PM, Thomas Hrabe <th...@gm...> wrote:
>
> >
> > Hi all,
> >
> > I am a beginner with matplotlib and doing my first steps with python
> > plotting.
> > However, I learned that pyplot.show really forces the display of already
> > existing plots.
> >
> > For instance, when I type
> > In[2]: pyplot.plot([1,2,3])
> > Out[2]: [<matplotlib.lines.Line2D object at 0x2e33850>]
> >
> > nothing happens until I type
> >
> > In[3]: pyplot.show()
> >
> > After that, the interpreter halts until I close the new figure window.
> > Only
> > closing enables the interpreter to continue with my later input.
> Moreover,
> > typing
> > In[4]: pyplot.plot([1,2,3])
> >
> > again would display the figure immediately. Seems the gtk engine or
> > something else must be started up by pyplot.show once and, once running,
> > it
> > displays everything else after that instantly.
> > How can I tweak pyplot in such way that it would display my figures on
> the
> > very first pyplot.plot call without halting the input?
> >
> > Thank you in advance for your help,
> > Thomas
> >
> > --
> > View this message in context:
> > http://www.nabble.com/pyplot.show-tp25518658p25518658.html
> > Sent from the matplotlib - users mailing list archive at Nabble.com.
> >
> >
> >
> >
> ------------------------------------------------------------------------------
> > Come build with us! The BlackBerry&reg; Developer Conference in SF, CA
> > is the only developer event you need to attend this year. Jumpstart your
> > developing skills, take BlackBerry mobile applications to market and stay
> > ahead of the curve. Join us from November 9&#45;12, 2009. Register
> > now&#33;
> > http://p.sf.net/sfu/devconf
> > _______________________________________________
> > Matplotlib-users mailing list
> > Mat...@li...
> > https://lists.sourceforge.net/lists/listinfo/matplotlib-users
> >
>
>
> ------------------------------------------------------------------------------
> Come build with us! The BlackBerry&reg; Developer Conference in SF, CA
> is the only developer event you need to attend this year. Jumpstart your
> developing skills, take BlackBerry mobile applications to market and stay
> ahead of the curve. Join us from November 9&#45;12, 2009. Register now&#33;
> http://p.sf.net/sfu/devconf
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>
>
>
> --
> View this message in context:
> http://www.nabble.com/pyplot.show-tp25518658p25518780.html
> Sent from the matplotlib - users mailing list archive at Nabble.com.
>
>
>
> ------------------------------------------------------------------------------
> Come build with us! The BlackBerry&reg; Developer Conference in SF, CA
> is the only developer event you need to attend this year. Jumpstart your
> developing skills, take BlackBerry mobile applications to market and stay
> ahead of the curve. Join us from November 9&#45;12, 2009. Register now&#33;
> http://p.sf.net/sfu/devconf
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>
-- 
Gökhan

Hi,
thank you for the quick reply. Unfortunately, none of both works for me. 
values = [1,2,3];
pyplot.ioff(); 
#pyplot.ion();
print pyplot.isinteractive();
pyplot.plot(values);
pyplot.show();
The value (True|False) of interactive mode does not make a difference to the
plotting.
Other suggestionst?
Thanks so far!
>may be you can try pyplot.ion()? it turns interactive mode on.
>Hope this helps.
>On Sat, Sep 19, 2009 at 1:11 PM, Thomas Hrabe <th...@gm...> wrote:
>
> Hi all,
>
> I am a beginner with matplotlib and doing my first steps with python
> plotting.
> However, I learned that pyplot.show really forces the display of already
> existing plots.
>
> For instance, when I type
> In[2]: pyplot.plot([1,2,3])
> Out[2]: [<matplotlib.lines.Line2D object at 0x2e33850>]
>
> nothing happens until I type
>
> In[3]: pyplot.show()
>
> After that, the interpreter halts until I close the new figure window.
> Only
> closing enables the interpreter to continue with my later input. Moreover,
> typing
> In[4]: pyplot.plot([1,2,3])
>
> again would display the figure immediately. Seems the gtk engine or
> something else must be started up by pyplot.show once and, once running,
> it
> displays everything else after that instantly.
> How can I tweak pyplot in such way that it would display my figures on the
> very first pyplot.plot call without halting the input?
>
> Thank you in advance for your help,
> Thomas
>
> --
> View this message in context:
> http://www.nabble.com/pyplot.show-tp25518658p25518658.html
> Sent from the matplotlib - users mailing list archive at Nabble.com.
>
>
>
> ------------------------------------------------------------------------------
> Come build with us! The BlackBerry&reg; Developer Conference in SF, CA
> is the only developer event you need to attend this year. Jumpstart your
> developing skills, take BlackBerry mobile applications to market and stay
> ahead of the curve. Join us from November 9&#45;12, 2009. Register
> now&#33;
> http://p.sf.net/sfu/devconf
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>
------------------------------------------------------------------------------
Come build with us! The BlackBerry&reg; Developer Conference in SF, CA
is the only developer event you need to attend this year. Jumpstart your
developing skills, take BlackBerry mobile applications to market and stay 
ahead of the curve. Join us from November 9&#45;12, 2009. Register now&#33;
http://p.sf.net/sfu/devconf
_______________________________________________
Matplotlib-users mailing list
Mat...@li...
https://lists.sourceforge.net/lists/listinfo/matplotlib-users
-- 
View this message in context: http://www.nabble.com/pyplot.show-tp25518658p25518780.html
Sent from the matplotlib - users mailing list archive at Nabble.com.

Hi,
thank you for the quick reply. Unfortunately, none of both works for me.
values = [1,2,3];
pyplot.ioff();
#pyplot.ion();
print pyplot.isinteractive();
pyplot.plot(values);
pyplot.show();
The value (True|False) of interactive mode does not make a difference to the
plotting.
Other suggestionst?
Thanks so far!
2009年9月19日 sunqiang <sun...@gm...>
> may be you can try pyplot.ion()? it turns interactive mode on.
> Hope this helps.
> On Sat, Sep 19, 2009 at 1:11 PM, Thomas Hrabe <th...@gm...> wrote:
>
>>
>> Hi all,
>>
>> I am a beginner with matplotlib and doing my first steps with python
>> plotting.
>> However, I learned that pyplot.show really forces the display of already
>> existing plots.
>>
>> For instance, when I type
>> In[2]: pyplot.plot([1,2,3])
>> Out[2]: [<matplotlib.lines.Line2D object at 0x2e33850>]
>>
>> nothing happens until I type
>>
>> In[3]: pyplot.show()
>>
>> After that, the interpreter halts until I close the new figure window.
>> Only
>> closing enables the interpreter to continue with my later input. Moreover,
>> typing
>> In[4]: pyplot.plot([1,2,3])
>>
>> again would display the figure immediately. Seems the gtk engine or
>> something else must be started up by pyplot.show once and, once running,
>> it
>> displays everything else after that instantly.
>> How can I tweak pyplot in such way that it would display my figures on the
>> very first pyplot.plot call without halting the input?
>>
>> Thank you in advance for your help,
>> Thomas
>>
>> --
>> View this message in context:
>> http://www.nabble.com/pyplot.show-tp25518658p25518658.html
>> Sent from the matplotlib - users mailing list archive at Nabble.com.
>>
>>
>>
>> ------------------------------------------------------------------------------
>> Come build with us! The BlackBerry&reg; Developer Conference in SF, CA
>> is the only developer event you need to attend this year. Jumpstart your
>> developing skills, take BlackBerry mobile applications to market and stay
>> ahead of the curve. Join us from November 9&#45;12, 2009. Register
>> now&#33;
>> http://p.sf.net/sfu/devconf
>> _______________________________________________
>> Matplotlib-users mailing list
>> Mat...@li...
>> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>>
>
>

may be you can try pyplot.ion()? it turns interactive mode on.
Hope this helps.
On Sat, Sep 19, 2009 at 1:11 PM, Thomas Hrabe <th...@gm...> wrote:
>
> Hi all,
>
> I am a beginner with matplotlib and doing my first steps with python
> plotting.
> However, I learned that pyplot.show really forces the display of already
> existing plots.
>
> For instance, when I type
> In[2]: pyplot.plot([1,2,3])
> Out[2]: [<matplotlib.lines.Line2D object at 0x2e33850>]
>
> nothing happens until I type
>
> In[3]: pyplot.show()
>
> After that, the interpreter halts until I close the new figure window. Only
> closing enables the interpreter to continue with my later input. Moreover,
> typing
> In[4]: pyplot.plot([1,2,3])
>
> again would display the figure immediately. Seems the gtk engine or
> something else must be started up by pyplot.show once and, once running, it
> displays everything else after that instantly.
> How can I tweak pyplot in such way that it would display my figures on the
> very first pyplot.plot call without halting the input?
>
> Thank you in advance for your help,
> Thomas
>
> --
> View this message in context:
> http://www.nabble.com/pyplot.show-tp25518658p25518658.html
> Sent from the matplotlib - users mailing list archive at Nabble.com.
>
>
>
> ------------------------------------------------------------------------------
> Come build with us! The BlackBerry&reg; Developer Conference in SF, CA
> is the only developer event you need to attend this year. Jumpstart your
> developing skills, take BlackBerry mobile applications to market and stay
> ahead of the curve. Join us from November 9&#45;12, 2009. Register now&#33;
> http://p.sf.net/sfu/devconf
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>

Hi all,
I am a beginner with matplotlib and doing my first steps with python
plotting.
However, I learned that pyplot.show really forces the display of already
existing plots.
For instance, when I type 
In[2]: pyplot.plot([1,2,3])
Out[2]: [<matplotlib.lines.Line2D object at 0x2e33850>] 
nothing happens until I type
In[3]: pyplot.show()
After that, the interpreter halts until I close the new figure window. Only
closing enables the interpreter to continue with my later input. Moreover,
typing 
In[4]: pyplot.plot([1,2,3])
again would display the figure immediately. Seems the gtk engine or
something else must be started up by pyplot.show once and, once running, it
displays everything else after that instantly.
How can I tweak pyplot in such way that it would display my figures on the
very first pyplot.plot call without halting the input?
Thank you in advance for your help,
Thomas
-- 
View this message in context: http://www.nabble.com/pyplot.show-tp25518658p25518658.html
Sent from the matplotlib - users mailing list archive at Nabble.com.

Hi,
Is there a standard way to compute first and then plot something 
later? For example, I would like to generate a fine contour plot, 
then use it as a background later.
x = np.linspace(-1,1,1000)
X,Y = np.meshgrid(x,x)
Z = ((X*X + Y*Y) - 0.5)**2 + Y**2
contours = plt.contour(X,Y,Z,100) # Takes a while...
del x, X, Y, Z
I would like to the later plot the contours quickly. What is the 
"proper" way to do this in general? I can do something like the 
following, but it seems like a hack (and may be missing important 
connections: for example, I initially forgot to set the transform 
which meant that the data was disconnected from the axis scale...)
f = plt.figure()
ax = plt.gca()
for collection in contours.collections:
 collection.set_transform(ax.transData)
 ax.add_collection(collection)
ax.autoscale_view()
plt.draw()
Have I forgotten anything here? I would have expected that, for any 
plotting command, the return value could be passed to an axis command, 
something like
f = plt.figure()
ax = plt.gca()
ax.add(contours)
or maybe even
ax.contour(contours)
though a general function to take the object returned by a plot 
command and plot it on the current axis efficiently would be best.
I can't find this functionality or a description about how to do 
this. Any suggestions?
Likewise, is there an easy way to "duplicate" a figure (including the 
axes properties etc.) so one can produce two similar figures with 
slightly modified parameters?
Thanks,
Michael.