changeset 3269:7c55f5991889

[project @ 1999-09-21 04:15:41 by jwe]
author jwe
date Tue, 21 Sep 1999 04:15:46 +0000
parents fdc7dd08cd85
children fe641c25df90
files scripts/general/linspace.m scripts/linear-algebra/pinv.m
diffstat 2 files changed, 0 insertions(+), 115 deletions(-) [+]
line wrap: on
line diff
deleted file mode 100644
--- a/scripts/general/linspace.m
+++ /dev/null
@@ -1,60 +0,0 @@
-## Copyright (C) 1996, 1997 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.
-
-## usage: linspace (x1, x2, n)
-##
-## Return a vector of n equally spaced points between x1 and x2
-## inclusive. 
-##
-## If the final argument is omitted, n = 100 is assumed.
-##
-## All three arguments must be scalars.
-##
-## See also: logspace
-
-## Author: jwe
-
-function retval = linspace (x1, x2, n)
-
-  if (nargin == 2)
-    npoints = 100;
-  elseif (nargin == 3)
-    if (length (n) == 1)
-      npoints = fix (n);
-    else
-      error ("linspace: arguments must be scalars");
-    endif
-  else
-    usage ("linspace (x1, x2 [, n])");
-  endif
-
-  if (npoints < 2)
-    error ("linspace: npoints must be greater than 2");
-  endif
-
-  ## In some cases x1 + delta * (npoints - 1) will not be equal to x2,
-  ## so we cheat and force the last value to be x2.
-
-  if (length (x1) == 1 && length (x2) == 1)
-    delta = (x2 - x1) / (npoints - 1);
-    retval = [x1+(0:npoints-2)*delta, x2];
-  else
-    error ("linspace: arguments must be scalars");
-  endif
-
-endfunction
deleted file mode 100644
--- a/scripts/linear-algebra/pinv.m
+++ /dev/null
@@ -1,55 +0,0 @@
-## Copyright (C) 1996, 1997 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.
-
-## 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.
-
-## Author: Kurt Hornik (hornik@neuro.tuwien.ac.at>
-## Created: March 1993.
-## Adapted-By: jwe
-
-function retval = pinv (X, tol)
-
-  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