File: buttmag.cat

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buttmag(1)                     Scilab Function                     buttmag(1)
NAME
  buttmag -  response of Butterworth filter

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

PARAMETERS

  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 fre-
  quency ; sample = sample of frequencies

EXAMPLE
  //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])

AUTHOR
  F. D.