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[Octave-bug-tracker] [bug #40155] Octave does not produce same results a
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From: |
Doug Stewart |
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Subject: |
[Octave-bug-tracker] [bug #40155] Octave does not produce same results as Matlab for iir scripts |
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Date: |
Tue, 01 Oct 2013 17:28:35 +0000 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.76 Safari/537.36 |
Follow-up Comment #3, bug #40155 (project octave):
would someone with matlab try this code:
N=7;
Wn=.4;
res='low';
[Z,P,K]=butter(N,Wn,res);
sos=zp2sos(Z,P,K) % Convert ZP to SOS
in Octave with this code I get:
N=7;
Wn=.4;
res='low';
[Z,P,K]=butter(N,Wn,res);
sos=zp2sos(Z',P',K) % Convert ZP to SOS
sos =
1.00000 2.00000 1.00000 1.00000 -0.33284 0.07708
1.00000 2.00000 1.00000 1.00000 -0.38797 0.25551
1.00000 2.00000 1.00000 1.00000 -0.51008 0.65067
1.00000 1.00000 -0.00000 1.00000 -0.15838 0.00000
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