[Octave-bug-tracker] [bug #63440] [octave forge] (signal) sosfilt - NaN

[Charles Praplan]

Follow-up Comment #5, bug #63440 (project octave):

Hi Renato,

I made some comparisons between octave 7.3.0 (with latest zp2sos), octave
6.4.0 and matlab.

I checked the following variables and I could not see any differences (except
some rounding at 10e-9, and ordering of values):

- z, p, k
- sos

If this is ok, the problem cannot be in zp2sos!

However, I also compared the variables "filtered" and "normalized" (before
your while loop) using a signal "typenoise" that I saved in a file (else it is
different at each execution and it is not available in Matlab).

Here again I could not see any problem.

So I'm pretty sure that your problem is not linked to the zp2sos function.

Can you make the same comparisons on your side, of course using the same data
for all your tests (i.e. saving typenoise in a file)?






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