## Examples## Hankel matrixis specified in MATLAB/Octave by a structure variable with fields s.m = m; s.n = n; If ## Mosaic Hankel matrixA mosaic Hankel matrix is specified by the vectors For example, with , s.m = [m1; m2]; s.n = [n1; n2]; ## Unstructured matrixAn unstructured matrix is a special case of a mosaic Hankel matrix and is specified by s.m = ones(m, 1); s.n = ones(n, 1); ## Weight vectorThe vector of weights is considered part of the structure and is specified by a filed s.w = w; ## Exact elementsExact elements of , i.e., constraints , are specifies by infinite weights: s.w(I_exact) = inf; where ## Missing elementsMissing elements of are specified by setting them to p(I_missing) = NaN; where |