MATLAB: Butterworth low pass filter

butterworth

This is the firt time to learn program in matlab. And now I get a problem . I want to design a IIR butterworth low pass filter, order 10 and cutoff frequency pi/2. How should I start the problem or what kind of function shoud I use .
Can anyone give me some suggestions ? Thanks very much!

Best Answer

Have you read the reference page for butter.m?
[B,A] = butter(10,1/2);
% Visualize filter
fvtool(B,A)
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