% -*- texinfo -*- % @deftypefn {Function File} {} convmtx (@var{a}, @var{n}) % If @var{a} is a column vector and @var{x} is a column vector % of length @var{n}, then % % @code{convmtx(@var{a}, @var{n}) * @var{x}} % % gives the convolution of of @var{a} and @var{x} and is the % same as @code{conv(@var{a}, @var{x})}. The difference is if % many vectors are to be convolved with the same vector, then % this technique is possibly faster. % % Similarly, if @var{a} is a row vector and @var{x} is a row % vector of length @var{n}, then % % @code{@var{x} * convmtx(@var{a}, @var{n})} % % is the same as @code{conv(@var{x}, @var{a})}. % @end deftypefn % @seealso{conv}

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