Re: mathematica command to define discrete functions
- From: Dave Seaman <dseaman@xxxxxxxxxxxx>
- Date: Tue, 26 Jul 2005 21:29:35 +0000 (UTC)
On Tue, 26 Jul 2005 22:58:45 +0200, Scoobidoo wrote:
> I'm looking for a mathematica command to define a function only at specific
> points. For example
> f(-1,1)=1/9
> f(2,3)=45/123
> in other words to define the function f:{{-1,1},{2,3}}->{1/9,45/123} so that
> I can write for example f(-1,1)+f(2,3) and get the sum of 1/9 and 45/123
Function notation in Mathematica always uses brackets, never parentheses.
In[1]:= f[-1,1]=1/9
1
Out[1]= -
9
In[2]:= f[2,3]=45/123
15
Out[2]= --
41
In[3]:= f[-1,1]+f[2,3]
176
Out[3]= ---
369
--
Dave Seaman
Judge Yohn's mistakes revealed in Mumia Abu-Jamal ruling.
<http://www.commoncouragepress.com/index.cfm?action=book&bookid=228>
.
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