# HG changeset patch
# User jwe
# Date 910369453 0
# Node ID 8cc04ca5b4caa2649ae0c1281a440fb417bd5640
# Parent  ba1c7cdc60907bb21131bcdeb70844259b49e410
[project @ 1998-11-06 16:24:13 by jwe]

diff -r ba1c7cdc6090 -r 8cc04ca5b4ca scripts/control/pinv.m
--- a/scripts/control/pinv.m	Fri Nov 06 16:16:31 1998 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,55 +0,0 @@
-# Copyright (C) 1994 John W. Eaton
-#
-# This file is part of Octave.
-#
-# Octave 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.
-#
-# Octave 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 Octave; see the file COPYING.  If not, write to the Free
-# Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
-
-function retval = pinv (X, tol)
-
-# usage: pinv (X, tol)
-#
-# Returns the pseudoinverse of X; singular values less than tol are
-# ignored.
-#
-# If the second argument is omitted, it is assumed that
-#
-#   tol = max (size (X)) * sigma_max (X) * eps,
-#
-# where sigma_max(X) is the maximal singular value of X.
-
-# Written by Kurt Hornik (hornik@neuro.tuwien.ac.at) March 1993.
-# Dept of Probability Theory and Statistics TU Wien, Austria.
-# $Revision: 1.1 $
-
-  if (nargin < 1 || nargin > 2)
-    error ("usage: pinv (X [, tol])");
-  endif
-
-  [U, S, V] = svd(X);
-  s = diag(S);
-
-  if (nargin == 1)
-    tol = max (size (X)) * s (1) * eps;
-  endif
-
-  r = sum (s > tol);
-  if (r == 0)
-    retval = zeros (X');
-  else
-    D = diag (ones (r, 1) ./ s (1:r));
-    retval = V (:, 1:r) * D * U (:, 1:r)';
-  endif
-
-endfunction