Re: [OctDev] Suspected bug in remez command?

[Robert T. Short]

On 01/15/2012 04:41 AM, Anders wrote: I am experiencing problems with the remez command in Octave 3.2.4 on Windows. I have tried a number of different orders and griddensities, but all seem to give error. I am trying to define a differentiator. Example:  B=remez(4,[0 0.8],[0 0.8]*pi,'differentiator',4*1024) gives me coefficients   -0.02488   0.35098  -1.00103   0.00000 ... (neg. symmetry) MATLAB's firpm, which I understand should give the same (similar) output, gives B=  0.1519   -0.4161    0.9424         0 The MATLAB result is a really decent differentiator, which cannot be said about the remez output. Could anyone hint me at a solution? Have I misunderstood anything about the remez function? Anders ------------------------------------------------------------------------------ RSA(R) Conference 2012 Mar 27 - Feb 2 Save $400 by Jan. 27 Register now! http://p.sf.net/sfu/rsa-sfdev2dev2 _______________________________________________ Octave-dev mailing list Octave-dev@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/octave-dev I don't think this function works.  I have not tried it in a long time, but I never got any useful results. I played around with it enough to believe it would not be hard to fix, but it has never bubbled up the priority stack enough to actually do it. Bob Bob

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