[Octave-bug-tracker] [bug #60076] [octave forge] (signal) xcorr bug for large datasets

[Mark van Rossum]

Follow-up Comment #3, bug #60076 (project octave):

Hi 
Thanks for looking into this and sorry for not attaching a plot.
I attach it now. 

Very oddly, for the longer time-series the plot changes from run to run.

The xcorr function uses a Fourier transform, and perhaps there is a rounding
bug in some versions of that library.
What system do you use?

This is on a fresh (reinstall) of Octave and "pkg -forge install signal".
"which xcorr" returns
'xcorr' is a function from the file
/usr/share/octave/packages/signal-1.4.1/xcorr.m


(file #50885)
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11-16-01.png?file_id=50885>



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