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Re: different results in fft of an chirp in matlab and octave
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From: |
Mike Miller |
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Subject: |
Re: different results in fft of an chirp in matlab and octave |
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Date: |
Wed, 7 Mar 2018 13:33:39 -0800 |
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User-agent: |
Mutt/1.9.3 (2018-01-21) |
On Wed, Mar 07, 2018 at 14:47:54 +0100, Dietmar Warning wrote:
> can anybody help me to find out why I get different results by
> plotting the fft results of a 800 ... 50kHz chirp Signal in matlab and
> octave.
>
> Please see the attached screenshots and the used script. It looks for
> me that the behaviour in low frequency end is more reasonable in
> matlab.
Yes, this is likely an error in the Octave chirp function with the
"logarithmic" option. It would be very helpful if you could file a bug
with your example showing the difference at
https://savannah.gnu.org/bugs/?group=octave&func=additem
--
mike
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