;;; calc-vec.el --- vector functions for Calc
;; Copyright (C) 1990, 1991, 1992, 1993, 2001, 2002, 2003, 2004,
-;; 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+;; 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
;; Author: David Gillespie <daveg@synaptics.com>
;; 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
+;; 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, or (at your option)
-;; any later version.
+;; 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; without even the implied warranty of
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs; see the file COPYING. If not, write to the
-;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
-;; Boston, MA 02110-1301, USA.
+;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
(calc-wrapper
(calc-binary-op "cros" 'calcFunc-cross arg)))
+(defun calc-kron (arg)
+ (interactive "P")
+ (calc-wrapper
+ (calc-binary-op "kron" 'calcFunc-kron arg)))
+
(defun calc-remove-duplicates (arg)
(interactive "P")
(calc-wrapper
(defun calcFunc-venum (a)
(setq a (calcFunc-vfloor a t))
(or (math-constp a) (math-reject-arg a "*Set must be finite"))
- (let ((p a) next)
- (while (cdr p)
- (setq next (cdr p))
- (if (eq (car-safe (nth 1 p)) 'intv)
- (setcdr p (nconc (cdr (calcFunc-index (math-add
- (math-sub (nth 3 (nth 1 p))
- (nth 2 (nth 1 p)))
- 1)
- (nth 2 (nth 1 p))))
- (cdr (cdr p)))))
- (setq p next))
- a))
+ (let* ((prev a) (this (cdr prev)) this-val next this-last)
+ (while this
+ (setq next (cdr this)
+ this-val (car this))
+ (if (eq (car-safe this-val) 'intv)
+ (progn
+ (setq this (cdr (calcFunc-index (math-add
+ (math-sub (nth 3 this-val)
+ (nth 2 this-val))
+ 1)
+ (nth 2 this-val))))
+ (setq this-last (last this))
+ (setcdr this-last next)
+ (setcdr prev this)
+ (setq prev this-last))
+ (setq prev this))
+ (setq this next)))
+ a)
(defun calcFunc-vpack (a)
(setq a (calcFunc-vfloor a t))
(if w (setq a (math-clip a w)))
(if (math-messy-integerp a) (setq a (math-trunc a)))
(let* ((calc-number-radix 2)
+ (calc-twos-complement-mode nil)
(neg (math-negp a))
(aa (if neg (math-sub -1 a) a))
(str (if (eq aa 0)
(math-reject-arg a "*Three-vector expected")))
+;;; Compute a Kronecker product
+(defun calcFunc-kron (x y &optional nocheck)
+ "The Kronecker product of objects X and Y.
+The objects X and Y may be scalars, vectors or matrices.
+The type of the result depends on the types of the operands;
+the product of two scalars is a scalar,
+of one scalar and a vector is a vector,
+of two vectors is a vector.
+of one vector and a matrix is a matrix,
+of two matrices is a matrix."
+ (unless nocheck
+ (cond ((or (math-matrixp x)
+ (math-matrixp y))
+ (unless (math-matrixp x)
+ (setq x (if (math-vectorp x)
+ (list 'vec x)
+ (list 'vec (list 'vec x)))))
+ (unless (math-matrixp y)
+ (setq y (if (math-vectorp y)
+ (list 'vec y)
+ (list 'vec (list 'vec y))))))
+ ((or (math-vectorp x)
+ (math-vectorp y))
+ (unless (math-vectorp x)
+ (setq x (list 'vec x)))
+ (unless (math-vectorp y)
+ (setq y (list 'vec y))))))
+ (if (math-vectorp x)
+ (let (ret)
+ (dolist (v (cdr x))
+ (dolist (w (cdr y))
+ (setq ret (cons (calcFunc-kron v w t) ret))))
+ (cons 'vec (nreverse ret)))
+ (math-mul x y)))
+
;; The variable math-rb-close is local to math-read-brackets, but
;; is used by math-read-vector, which is called (directly and
(provide 'calc-vec)
-;;; arch-tag: 7902a7af-ec69-440a-8635-ebb4db263402
+;; arch-tag: 7902a7af-ec69-440a-8635-ebb4db263402
;;; calc-vec.el ends here
HCoop / bpt / emacs.git / blobdiff