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.TH wfir 1 "April 1993" "Scilab Group" "Scilab Function"
.so ../sci.an
.SH NAME
wfir - linear-phase FIR filters
.SH CALLING SEQUENCE
.nf
[wft,wfm,fr]=wfir(ftype,forder,cfreq,wtype,fpar)
.fi
.SH PARAMETERS
.TP
ftype
: string : \fV'lp','hp','bp','sb'\fR (filter type)
.TP
forder
: Filter order (pos integer)(odd for \fVftype='hp'\fR or \fV'sb'\fR)
.TP
cfreq
: 2-vector of cutoff frequencies (\fV0<cfreq(1),cfreq(2)<.5\fR)
only \fVcfreq(1)\fR is used when \fVftype='lp'\fR or \fV'hp'\fR
.TP
wtype
: Window type (\fV're','tr','hm','hn','kr','ch'\fR)
.TP
fpar
: 2-vector of window parameters.
Kaiser window \fVfpar(1)>0 fpar(2)=0\fR. Chebyshev window
\fVfpar(1)>0, fpar(2)<0\fR or \fVfpar(1)<0, 0<fpar(2)<.5\fR
.TP
wft
: time domain filter coefficients
.TP
wfm
: frequency domain filter response on the grid fr
.TP
fr
: Frequency grid
.SH DESCRIPTION
Function which makes linear-phase, FIR low-pass, band-pass,
high-pass, and stop-band filters
using the windowing technique.
Works interactively if called with no arguments.
.SH AUTHOR
C. Bunks
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