thanks Johan,
I posted to scipy because of histogram2d being in numpy, sorry about that.
Now the stupid question, why can't imshow directly parse histogram2d, 
without the transitory extent object?
Anyway, I am happy that there is a simple way as explained below!

thanks again,
Johann

John Hunter wrote:
> On Fri, Sep 5, 2008 at 10:36 AM, Johann Cohen-Tanugi
> <[EMAIL PROTECTED]> wrote:
>   
>> hi, I hope someone can quickly point me to some doc.
>> I can do imshow(histogram2d(x,y)[0]) but then I miss the x and y binning
>> correct labels.
>> If I do imshow(histogram2d(x,y)) I get:
>> ERROR: An unexpected error occurred while tokenizing input
>> The following traceback may be corrupted or invalid
>> The error message is: ('EOF in multi-line statement', (115, 0))
>>     
>
> matplotlib questions are best addressed to the matplotlib-users mailing list 
> at
>
>    http://lists.sourceforge.net/mailman/listinfo/matplotlib-users
>
> histogram2d returns H, xedges and yedges.  The first argument should
> be passed to imshow, and the second two can be used to get the extents
>
> In [26]: x, y = np.random.randn(2, 100000)
>
> In [27]: H, xedges, yedges = np.histogram2d(x, y, bins=50)
>
> In [28]: extent = [xedges[0], xedges[-1], yedges[0], yedges[-1]]
>
> In [29]: imshow(H, extent=extent)
> Out[29]: <matplotlib.image.AxesImage object at 0x9377bcc>
>
> I
> _______________________________________________
> SciPy-user mailing list
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>   

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