Mercurial > hg > octave-nkf
diff scripts/signal/fftconv.m @ 904:3470f1e25a79
[project @ 1994-11-09 21:22:15 by jwe]
| author | jwe |
|---|---|
| date | Wed, 09 Nov 1994 21:22:15 +0000 |
| parents | c5d35bb139b6 |
| children | 9fc405c8c06c |
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--- a/scripts/signal/fftconv.m +++ b/scripts/signal/fftconv.m @@ -1,20 +1,20 @@ function c = fftconv (a, b, N) - # usage: fftconv (a, b [, N]) - # - # c = fftconv (a, b) returns the convolution of the vectors a and b, - # a vector with length equal to length (a) + length (b) - 1. - # If a and b are the coefficient vectors of two polynomials, c is - # the coefficient vector of the product polynomial. - # - # The computation uses the FFT by calling fftfilt. If the optional - # argument N is specified, an N-point FFT is used. +# usage: fftconv (a, b [, N]) +# +# c = fftconv (a, b) returns the convolution of the vectors a and b, +# a vector with length equal to length (a) + length (b) - 1. +# If a and b are the coefficient vectors of two polynomials, c is +# the coefficient vector of the product polynomial. +# +# The computation uses the FFT by calling fftfilt. If the optional +# argument N is specified, an N-point FFT is used. - # Written by KH (Kurt.Hornik@ci.tuwien.ac.at) on Sep 3, 1994 - # Copyright Dept of Statistics and Probability Theory TU Wien +# Written by KH (Kurt.Hornik@ci.tuwien.ac.at) on Sep 3, 1994 +# Copyright Dept of Statistics and Probability Theory TU Wien if (nargin < 2 || nargin > 3) - error ("usage: fftconv (b, x [, N])"); + usage (" fftconv (b, x [, N])"); endif if (is_matrix (a) || is_matrix (b))