[Numpy-discussion] zoom FFT with numpy?

Stefan van der Walt stefan@sun.ac...
Fri Mar 16 02:13:07 CDT 2007


Here is another implementation of the Chirp-Z transform in Python,
that handles complex numbers.

Regards
Stéfan

On Thu, Mar 15, 2007 at 11:53:49AM +0200, Nadav Horesh wrote:
> A long time ago I translated a free code of chirp z transform (zoom fft) into
> python.
> Attached here the source and two translations (probably one of the is right)
> 
>   Nadav.
> 
> On Wed, 2007-03-14 at 14:02 -0800, Ray S wrote:
> 
>     We'd like to do what most call a "zoom FFT"; we only are interested
>     in the frequencies of say, 6kHZ to 9kHz with a given N, and so the
>     computations from DC to 6kHz are wasted CPU time.
>     Can this be done without additional numpy pre-filtering computations?
-------------- next part --------------
A non-text attachment was scrubbed...
Name: chirpz.py
Type: text/x-python
Size: 1135 bytes
Desc: not available
Url : http://projects.scipy.org/pipermail/numpy-discussion/attachments/20070316/330a24be/attachment.py 


More information about the Numpy-discussion mailing list