dp

来自「Calc Software Package for Number Calc」· 代码 · 共 64 行

NAME
    dp - dot product of two vectors

SYNOPSIS
    dp(x, y)

TYPES
    x, y	1-dimensional matrices of the same size

    return	depends on the nature of the elements of x and y

DESCRIPTION
    Compute the dot product of two 1-dimensional matrices.

    Let:

	x = {x0, x1, ... xn}
	y = {y0, y1, ... yn}

    Then dp(x,y) returns the result of the calculation:

	x0*y0 + x1*y1 + ... + xn*yn

EXAMPLE
    ; mat x[3] = {2,3,4}
    ; mat y[1:3] = {3,4,5}
    ; print dp(x,y)
    38

LIMITS
    none

LINK LIBRARY
    VALUE matdot(MATRIX *x, MATRIX *y)

SEE ALSO
    cp

## Copyright (C) 1999  Landon Curt Noll
##
## Calc is open software; you can redistribute it and/or modify it under
## the terms of the version 2.1 of the GNU Lesser General Public License
## as published by the Free Software Foundation.
##
## Calc 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 Lesser General
## Public License for more details.
##
## A copy of version 2.1 of the GNU Lesser General Public License is
## distributed with calc under the filename COPYING-LGPL.  You should have
## received a copy with calc; if not, write to Free Software Foundation, Inc.
## 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.
##
## @(#) $Revision: 29.3 $
## @(#) $Id: dp,v 29.3 2006/05/07 07:25:46 chongo Exp $
## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/dp,v $
##
## Under source code control:	1995/10/05 04:52:26
## File existed as early as:	1995
##
## chongo <was here> /\oo/\	http://www.isthe.com/chongo/
## Share and enjoy!  :-)	http://www.isthe.com/chongo/tech/comp/calc/