function p = matrix_T_pdf(A, M, V, K, n)% MATRIX_T_PDF Evaluate the density of a matrix under a Matrix-T distribution% p = matrix_T_pdf(A, M, V, K, n)% See "Bayesian Linear Regression", T. Minka, MIT Tech Report, 2001[d m] = size(K);is = 1:d;c1 = prod(gamma((n+1-is)/2)) / prod(gamma((n-m+1-is)/2));c2 = det(K)^(d/2) / det(pi*V)^(m/2); %% pi or 2pi?p = c1 * c2 * det((A-M)'*inv(V)*(A-M)*K + eye(m))^(-n/2);