%%  T = build_toep( c, d, n );%%  Given:%    c - the nonzero part of a central column of a banded Toeplitz%        matrix%    d - index of c containing the diagonal element of T%    n - dimension of the banded Toeplitz matrix%%  The banded Toeplitz matrix is constructed explicitly.%function T = build_toep( c, d, n )m = length( c );col = zeros(n,1);row = col';col(1:m-d+1,1) = c(d:m);row(1,1:d) = c(d:-1:1)';T = toeplitz( col, row );