[Octave-bug-tracker] [bug #31730] chebwin() function gives wildly different results from matlab with low values of the 'at' parameter

[Rik]

Update of bug #31730 (project octave):

                  Status:                    None => Octave Forge           
             Open/Closed:                    Open => Closed                 

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Follow-up Comment #1:

chebwin is not a function from Octave core, but from the Octave-Forge
packages.  Those are separately maintained.  Please re-file your bug with
them.

This seems pretty easy to fix though, according to the documentation.

## Note that the denominator in W(k) above is not computed, and after
## the inverse Fourier transform the window is scaled by making its
## maximum value unitary.


It appears that the chebwin function is *not* normalizing the result.  This
code gives me the same results as Matlab.

win = chebmin(10,10);
win = win ./ max(win)




This looks like a problem with an Octave Forge package, not a bug
in Octave.  The correct place to report this problem is the
Octave Forge mailing list, address@hidden

A copy of this update to the bug report is being sent to that
list so that they are aware of it.  Please follow up there.

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  <http://savannah.gnu.org/bugs/?31730>

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