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Scilab manual >> Signal Processing > buttmag

buttmag

response of Butterworth filter

Calling Sequence

[h]=buttmag(order,omegac,sample)

Arguments

order

integer : filter order

omegac

real : cut-off frequency in Hertz

sample

vector of frequency where buttmag is evaluated

h

Butterworth filter values at sample points

Description

squared magnitude response of a Butterworth filter omegac = cutoff frequency ; sample = sample of frequencies

Examples

//squared magnitude response of Butterworth filter
h=buttmag(13,300,1:1000);
mag=20*log(h)'/log(10);
plot2d((1:1000)',mag,[2],"011"," ",[0,-180,1000,20])

Authors

F. D.

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Last updated:
Wed Jan 26 16:23:41 CET 2011