NAME
    randperm - randomly permute a list or matrix

SYNOPSIS
    randperm(x)

TYPES
    x           list or matrix

    return      same as x

DESCRIPTION
    For a list or matrix x, randperm(x) returns a copy of x in which
    the elements have been randomly permuted.  The value of x is not
    changed.

    This function uses the rand() subtractive 100 shuffle pseudo-random
    number generator.

EXAMPLE
    ; A = list(1,2,2,3,4)
    ; randperm(A)

    list (5 elements, 5 nonzero):
          [[0]] = 4
          [[1]] = 1
          [[2]] = 2
          [[3]] = 3
          [[4]] = 2

    ; randperm(A)

    list (5 elements, 5 nonzero):
          [[0]] = 2
          [[1]] = 1
          [[2]] = 4
          [[3]] = 2
          [[4]] = 3

LIMITS
    none

LINK LIBRARY
    none

SEE ALSO
    comb, fact, rand, perm

## Copyright (C) 1999-2006,2023  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.
##
## Under source code control:   1995/07/10 02:09:31
## 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/
