function c = cs_counts (A,mode) %#ok %CS_COUNTS column counts for sparse Cholesky factor L. % c = cs_counts(A) returns a vector of the column counts of L, for the % Cholesky factorization L*L' = A. That is, c = sum(spones(chol(A)')), % except the Cholesky factorization is not computed. % c = cs_counts(A), returns counts for cs_chol(A). % c = cs_counts(A,'col'), returns counts for cs_chol(A'*A). % c = cs_counts(A,'sym'), same as cs_counts(A). % % Example: % Prob = ssget ('HB/bcsstk01') ; A = Prob.A ; c = cs_counts (A) % full (sum (spones (chol (A)'))) % % See also SYMBFACT. % CXSparse, Copyright (c) 2006-2022, Timothy A. Davis. All Rights Reserved. % SPDX-License-Identifier: LGPL-2.1+ error ('cs_counts mexFunction not found') ;