/usr/share/calc/help/mattrace is in apcalc-common 2.12.4.4-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 | NAME
mattrace - trace of a square matrix
SYNOPSIS
mattrace(m)
TYPES
m square matrix with summable diagonal elements
return determined by addition of elements
DESCRIPTION
For a two-dimensional square matrix, mattrace(m) returns the sum of
the elements on the principal diagonal. In particular, if m
has been created by mat m[N,N] where N > 0, mattrace(m) returns
m[0,0] + m{1,1] + ... + m[N-1,N-1]
EXAMPLE
; mat m[2,2] = {1,2,3,4}
; print mattrace(m), mattrace(m^2)
5 29
LIMITS
none
LINK LIBRARY
none
SEE ALSO
mat, mattrans
## 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.
## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
##
## @(#) $Revision: 30.1 $
## @(#) $Id: mattrace,v 30.1 2007/03/16 11:10:42 chongo Exp $
## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/mattrace,v $
##
## Under source code control: 1997/09/06 20:03:35
## File existed as early as: 1997
##
## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
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