Re: defined
- To: mathgroup at smc.vnet.net
- Subject: [mg103396] Re: defined
- From: Bill Rowe <readnews at sbcglobal.net>
- Date: Sun, 20 Sep 2009 06:20:48 -0400 (EDT)
On 9/19/09 at 5:26 AM, murray at math.umass.edu (Murray Eisenberg) wrote: >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 In[1]:= f[x_, y_, z_] := Sqrt[x^2 + y^2 + z^2] In[2]:= a = {4, 3, 2}; In[3]:= f @@ a Out[3]= Sqrt[29] In[4]:= Apply[f, a] Out[4]= Sqrt[29]