## Copyright (C) 1995, 1996, 1997 Kurt Hornik ## ## This program is free software; you can redistribute it and/or modify ## it under the terms of the GNU General Public License as published by ## the Free Software Foundation; either version 2, or (at your option) ## any later version. ## ## This program is distributed in the hope that it will be useful, but ## WITHOUT ANY WARRANTY; without even the implied warranty of ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ## General Public License for more details. ## ## You should have received a copy of the GNU General Public License ## along with this file. If not, write to the Free Software Foundation, ## 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. ## usage: dmult (a, B) ## ## If a is a vector of length rows (B), return diag (a) * B (but ## computed much more efficiently). ## Author: KH <Kurt.Hornik@ci.tuwien.ac.at> ## Description: Rescale the rows of a matrix function M = dmult (a, B) if (nargin != 2) usage ("dmult (a, B)"); endif s = size (a); if ((min (s) > 1) || (max (s) != rows (B))) error ("dmult: a must be a vector of length rows (B)"); endif M = (reshape (a, max (s), 1) * ones (1, columns (B))) .* B; endfunction

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