NAME
    modify - modify a list or matrix by changing the values of its elements

SYNOPSIS
    modify(x, y)

TYPES
    x		lvalue with list or matrix value
    y		string

    return	null value

DESCRIPTION
    For modify(x, y), y is to be the name fname of a user-defined function.
    The value of each element of x is replaced by the value of the
    function at that value, i.e.  if fname = "f", the value of x[[i]]
    is changed to f(x[[i]]).

    As the name indicates, modify(x) usually changes x values of elements
    in x.  To obtain a modified copy of x without changing values in x,
    one may xmod = x; modify(xmod, y) or more simply (xmod = x, y).

EXAMPLE
    > define f(x) = x^2
    > A = list(2,4,6)
    > modify(A, "f")
    > print A

    list (3 elements, 3 nonzero):
	  [[0]] = 4
	  [[1]] = 16
	  [[3]] = 36

LIMITS
    none

LINK LIBRARY
    none

SEE ALSO
    makelist

## 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: 29.2 $
## @(#) $Id: modify,v 29.2 2000/06/07 14:02:33 chongo Exp $
## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/modify,v $
##
## 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/