evaluate f[{x,y,z}] when f[x,y,z] defined
- To: mathgroup at smc.vnet.net
- Subject: [mg103383] evaluate f[{x,y,z}] when f[x,y,z] defined
- From: Murray Eisenberg <murray at math.umass.edu>
- Date: Sat, 19 Sep 2009 05:26:41 -0400 (EDT)
- Organization: Mathematics & Statistics, Univ. of Mass./Amherst
- Reply-to: murray at math.umass.edu
I ought to know how to do this (simply) but don't, or at least don't
recall how...
Often I have a function of several variables defined, for example:
f[x_, y_, z_] := Sqrt[x^2 + y^2 + z^2]
And I have some list of numbers, e.g.:
a = {4, 3, 2};
How can I evaluate the following...
f[a]
... without having to make a separate definition such as
f[{x_, y_, z_}] := f[x, y,z]
?
--
Murray Eisenberg murray at math.umass.edu
Mathematics & Statistics Dept.
Lederle Graduate Research Tower phone 413 549-1020 (H)
University of Massachusetts 413 545-2859 (W)
710 North Pleasant Street fax 413 545-1801
Amherst, MA 01003-9305
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