buttmag

Power transmission of a Butterworth filter

Calling Sequence

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

Arguments

:order integer : filter order : :omegac real : cut-off angular frequency (in rad/s) : :sample real vector of angular frequencies (in rad/s), where the

transmission must be 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])