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68 lines
2.0 KiB
Plaintext
68 lines
2.0 KiB
Plaintext
NAME
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modify - modify a list or matrix by changing the values of its elements
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SYNOPSIS
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modify(x, y)
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TYPES
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x lvalue with list or matrix value
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y string
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return null value
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DESCRIPTION
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For modify(x, y), y is to be the name fname of a user-defined function.
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The value of each element of x is replaced by the value of the
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function at that value, i.e. if fname = "f", the value of x[[i]]
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is changed to f(x[[i]]).
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As the name indicates, modify(x) usually changes x values of elements
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in x. To obtain a modified copy of x without changing values in x,
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one may xmod = x; modify(xmod, y) or more simply (xmod = x, y).
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EXAMPLE
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> define f(x) = x^2
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> A = list(2,4,6)
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> modify(A, "f")
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> print A
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list (3 elements, 3 nonzero):
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[[0]] = 4
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[[1]] = 16
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[[3]] = 36
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LIMITS
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none
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LINK LIBRARY
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none
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SEE ALSO
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makelist
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## Copyright (C) 1999 Landon Curt Noll
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##
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## Calc is open software; you can redistribute it and/or modify it under
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## the terms of the version 2.1 of the GNU Lesser General Public License
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## as published by the Free Software Foundation.
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##
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## Calc is distributed in the hope that it will be useful, but WITHOUT
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## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
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## Public License for more details.
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##
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## A copy of version 2.1 of the GNU Lesser General Public License is
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## distributed with calc under the filename COPYING-LGPL. You should have
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## received a copy with calc; if not, write to Free Software Foundation, Inc.
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## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
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##
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## @(#) $Revision: 29.2 $
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## @(#) $Id: modify,v 29.2 2000/06/07 14:02:33 chongo Exp $
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## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/modify,v $
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##
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## Under source code control: 1995/07/10 02:09:31
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## File existed as early as: 1995
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##
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## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
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## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
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