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Forwarded as requested....
On 10/8/06, Gael Varoquaux <gae...@no...> wrote:
> My apologies, I cannot post to any SF mailing lists currently. Could one
> of you (whoever sees this first) forward this message to matplotlib-dev,
> I can still receive post coming from there.
>
> I am really sorry to ask you such a service.
>
> Thanks a lot,
>
> Ga=EBl
>
> From: Gael Varoquaux <gael_dot_varoquaux_at_normalesup_dot_org>
> To: Matplotlib-devel <matplotlib-devel_at_lists_dot_sourceforge_dot_net>
> Subject: Good method for updating an imshow plot
>
> Hi,
>
> This does not belong to the devel mailing list, but to the users, but I
> cannon subscribe to the users, as my SMTP is black listed by SpamCop
> (screw them, the server isn't sending a single spam).
>
> My question is: what is the correct way to plot a matrix with an imshow,
> and then update this matrix on the plot. I am more interested by the mpl
> way of doing this, rather than the pylab way. The idea would be to
> replace the following pylab commands by something cleaner that would
> involve recreating axes:
>
> imshow(z1)
> clf()
> imshow(z2)
>
> Cheers,
>
>
> Ga=EBl
>

Hi,
I'll do these patches a little at a time.
Here is a patch to show a complex spectrogram with the negative frequencies
flipped down. I've also attached a modified version of the
spectrogram_demo.py that creates the two signals as complex exponentials so
they are only in one half of the spectrum (long signal positive, short
signal negative).
Basically, if the input signal is complex then the whole spectrogram is
shown. If the input is real then just the positive frequencies are shown.
Next I'll work on the following as discussed.
Thanks
Greg
On 10/6/06, John Hunter <jdh...@ac...> wrote:
>
> >>>>> "Greg" == Greg Willden <gre...@gm...> writes:
> Greg> c) Modify specgram so that if it
> Greg> receives an array as the window parameter it checks its
> Greg> length and then applies it as a window. If the window
> Greg> parameter is not an array then it treats it as a function
> Greg> (current behaviour)
>
> This is fine -- I suggest using the matplotlib.cookbook.iterable
> function or the python builtin callable function to do the check.
> Whatever changes you make for specgram should also be ported into psd,
> csd and cohere.
>
-- 
Linux. Because rebooting is for adding hardware.