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Søren Hauberg wrote:
> tor, 01 10 2009 kl. 00:27 +0200, skrev Couvreur, Christophe:
>> No problem. I'm happy to have my "old" Octave toolbox included.
>
> Sorry 'bout the late reply. I think it is fine to include the code in
> question in the 'signal' package. Would anybody care to suggest a patch?
> (or send the files in question to this list, so I don't have to figure
> out which files are relevant)
>
> Søren
Hello,
Thanks for your contribution Christophe! Attached is a patch that uses
the bilinear function as defined in octave-signal.
Best,
Paul
>
>
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diff -ruNad a/octave/adsgn.m b/octave/adsgn.m
--- a/octave/adsgn.m 1997-08-26 20:01:59.000000000 +0200
+++ b/octave/adsgn.m 2009-10-19 21:50:05.000000000 +0200
@@ -29,5 +29,5 @@
DENs = conv(conv(DENs,[1 2*pi*f3]),[1 2*pi*f2]);
% Use the bilinear transformation to get the digital filter.
-[B,A] = bilinear(NUMs,DENs,Fs);
+[B,A] = bilinear(NUMs,DENs,1./Fs);
diff -ruNad a/octave/cdsgn.m b/octave/cdsgn.m
--- a/octave/cdsgn.m 1997-08-26 20:01:59.000000000 +0200
+++ b/octave/cdsgn.m 2009-10-19 21:50:05.000000000 +0200
@@ -26,5 +26,5 @@
DENs = conv([1 +4*pi*f4 (2*pi*f4)^2],[1 +4*pi*f1 (2*pi*f1)^2]);
% Use the bilinear transformation to get the digital filter.
-[B,A] = bilinear(NUMs,DENs,Fs);
+[B,A] = bilinear(NUMs,DENs,1./Fs);
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