;;; calc-mtx.el --- matrix functions for Calc
-;; Copyright (C) 1990, 1991, 1992, 1993, 2001 Free Software Foundation, Inc.
+;; Copyright (C) 1990, 1991, 1992, 1993, 2001, 2002, 2003, 2004,
+;; 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
;; Author: David Gillespie <daveg@synaptics.com>
-;; Maintainers: D. Goel <deego@gnufans.org>
-;; Colin Walters <walters@debian.org>
+;; Maintainer: Jay Belanger <jay.p.belanger@gmail.com>
;; This file is part of GNU Emacs.
+;; GNU Emacs 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 3 of the License, or
+;; (at your option) any later version.
+
;; GNU Emacs is distributed in the hope that it will be useful,
-;; but WITHOUT ANY WARRANTY. No author or distributor
-;; accepts responsibility to anyone for the consequences of using it
-;; or for whether it serves any particular purpose or works at all,
-;; unless he says so in writing. Refer to the GNU Emacs General Public
-;; License for full details.
-
-;; Everyone is granted permission to copy, modify and redistribute
-;; GNU Emacs, but only under the conditions described in the
-;; GNU Emacs General Public License. A copy of this license is
-;; supposed to have been given to you along with GNU Emacs so you
-;; can know your rights and responsibilities. It should be in a
-;; file named COPYING. Among other things, the copyright notice
-;; and this notice must be preserved on all copies.
+;; 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 GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
-
;; This file is autoloaded from calc-ext.el.
-(require 'calc-ext)
+(require 'calc-ext)
(require 'calc-macs)
-(defun calc-Need-calc-mat () nil)
-
-
(defun calc-mdet (arg)
(interactive "P")
(calc-slow-wrapper
(nth 1 m)
(math-reject-arg m 'square-matrixp))))
+;; The variable math-det-lu is local to math-det-raw, but is
+;; used by math-det-step, which is called by math-det-raw.
+(defvar math-det-lu)
+
(defun math-det-raw (m)
(let ((n (1- (length m))))
(cond ((= n 1)
(nth 3 (nth 3 m))))))
(t (let ((lud (math-matrix-lud m)))
(if lud
- (let ((lu (car lud)))
+ (let ((math-det-lu (car lud)))
(math-det-step n (nth 2 lud)))
0))))))
(defun math-det-step (n prod)
(if (> n 0)
- (math-det-step (1- n) (math-mul prod (nth n (nth n lu))))
+ (math-det-step (1- n) (math-mul prod (nth n (nth n math-det-lu))))
prod))
;;; This returns a list (LU index d), or nil if not possible.
(math-reject-arg m "*Singular matrix"))
(math-reject-arg m 'square-matrixp)))
-;;; arch-tag: fc0947b1-90e1-4a23-8950-d8ead9c3a306
+(provide 'calc-mtx)
+
+;; arch-tag: fc0947b1-90e1-4a23-8950-d8ead9c3a306
;;; calc-mtx.el ends here