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fault in matlab help?

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Dries billiet
Dries billiet 2014-3-20
评论： Dries billiet 2014-3-24
Hello,
I am working on my thesis and I have to use a matlab filter for this. When I using the example on this page butter I tried the exact same filter. But mine was all but stable. How is this possible? Can somebody try this aswell? Thank you!
[z,p,k] = butter(9,300/500,'high');
sos = zp2sos(z,p,k);
fvtool(sos,'Analysis','freq')
  2 个评论
Honglei Chen
Honglei Chen 2014-3-20
编辑：Honglei Chen 2014-3-20
What version are you using? It works fine for me in R2013b.
Dries billiet
Dries billiet 2014-3-24
I am working with the R2012b.

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Chad Greene
Chad Greene 2014-3-20
编辑：Chad Greene 2014-3-20
Here's the result I get. Definitely does not match the documented example.
  2 个评论
Honglei Chen
Honglei Chen 2014-3-20
What version are you using? It works fine for me in R2013b.
Chad Greene
Chad Greene 2014-3-20
Interesting. I have R2012b.

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