MathGroup Archive: December 1994 [00026]

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Re: Finding index (easy?)

To: mathgroup at christensen.Cybernetics.NET
Subject: [mg280] Re: [mg260] Finding index (easy?)
From: corcoran (Stephen Corcoran) <corcoran%markov.stats at comlab.oxford.ac.uk>
Date: Sun, 4 Dec 1994 12:02:43 +0000

Sorry - I didn't explain my problem very well.  I need to find the *unknown*
arguments of something like,

t1 = beta1[y1] phi[y1,y2];

That is, t1 is a quantity generated in some code that I have written.  If
I am using Mma interactively, I can just type t1 (enter) and *see* what the 
indices of beta1 and phi are (in this case y1 and y1,y2 respectively).  But
within my program, I need a way of extracting the argument of beta1 from
the expression t1.   Any ideas?

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