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.TH cheb1mag 1 "April 1993" "Scilab Group" "Scilab Function"
.so ../sci.an
.SH NAME
cheb1mag - response of Chebyshev type 1 filter
.SH CALLING SEQUENCE
.nf
[h2]=cheb1mag(n,omegac,epsilon,sample)
.fi
.SH PARAMETERS
.TP 10
n
: integer : filter order
.TP
omegac
: real : cut-off frequency
.TP
epsilon
: real : ripple in pass band
.TP
sample
: vector of frequencies where \fVcheb1mag\fR is evaluated
.TP
h2
: Chebyshev I filter values at sample points
.SH DESCRIPTION
Square magnitude response of a type 1 Chebyshev filter.
.LP
\fVomegac\fR=passband edge.
.LP
\fVepsilon\fR: such that \fV1/(1+epsilon^2)\fR=passband ripple.
.LP
\fVsample\fR: vector of frequencies where the square magnitude
is desired.
.SH EXAMPLE
.nf
//Chebyshev; ripple in the passband
n=13;epsilon=0.2;omegac=3;sample=0:0.05:10;
h=cheb1mag(n,omegac,epsilon,sample);
plot(sample,h,'frequencies','magnitude')
.fi
.SH SEE ALSO
buttmag
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