Re: butter

[Juan Pablo Carbajal]

On Tue, Jun 4, 2013 at 1:59 PM, "Maximilian Schäkel"
<address@hidden> wrote:
> Octave does not know the command butter

Octave does not come with functions that are potentially used only by
coterie of users. There are the Octave-forge packages for that, in
your case
the signal package
http://octave.sourceforge.net/signal/index.html

When searching for functions try this page
http://octave.sourceforge.net/functions_by_alpha.php

Now, try sgolayfilt as well as butter. The sgolayfilt has better shape
conserving properties than butterworth filters (though is harder to
indicate cutoff frequency)