MATLAB Answers

Todd
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I'm using MATLAB 2008, and I have looked at some tutorials online about a Butterworth filter. Does MATLAB 2008 have this function?

Asked by Todd
on 11 Jul 2012
It does not seem to have it since I typed 'help butter' into the command window and it said function not found. Is there another way to use a butterworth filter in 2008 rather than get a new version of MATLAB?

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1 Answer

Answer by Thomas
on 11 Jul 2012
Edited by Thomas
on 11 Jul 2012

The Butterworth IIR filter design using specification object function 'butter' is not part of MATLAB core but the Signal processing toolbox (IF I remember it right)
You need to have the toolbox to use the ver function
>> ver
to see what toolboxes you have installed.
If you have the signal processing toolbox then you might want to see if it can find the function
>> which butter

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