help specmat compan -Companion matrix gallery -Several small test matrices hadamard Hadamard matrix hanke Hankel matrix hilb Hilbert matrix invhilb Inverse hilbert matrix magIc Magic square pascal -Pascal matrix toeplitz -Toeplitz matrix vander- Vandermonde matrixhelp specmat compan - Companion matrix. gallery - Several small test matrices. hadamard - Hadamard matrix. hankel - Hankel matrix. hilb - Hilbert matrix. invhilb - Inverse Hilbert matrix. magic - Magic square. pascal - Pascal matrix. toeplitz - Toeplitz matrix. vander - Vandermonde matrix