%Generate Hamming window of length M in vector of length n, start at j=m go to
%j=m+M-1.  Centers window at j = m+(M-1)/2, truncates to zero for j<m or
%j>m+M-1.  Assumes vector is indexed starting at j = 0.

function y = hammingwindow(n, m, M)

y = zeros(1,n);
t = 2*pi*[0:M]/M;
y(m:m+M) = 0.54 - 0.46*cos(t);

y = y(1:n);