Re: Finding a function within an arbitrary expression

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• Subject: [mg131351] Re: Finding a function within an arbitrary expression
• From: Ulrich Arndt <ulrich.arndt at data2knowledge.de>
• Date: Mon, 1 Jul 2013 05:46:18 -0400 (EDT)
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```Try position

a = {3*u[1, 0], u[0, 0]/10., 1/u[1, 0]}
pat = u[1, 0]
Position[a, pat]

Ulrich

Am 30.06.2013 um 09:29 schrieb amannucci:

> I am trying to figure out what that pattern is for the following. The
difficulty here is that I can think textually, but not in Mathematica
patterns.
>
> I am looking for a function u[1,0] within a list of expressions. The
function might not be defined yet. For example, a list of expressions
might be:
>
> {3*u[1,0], u[0,0]/10., 1/u[1,0], ...}
>
> I want to find all the expressions that have the function u[1,0] in
it. There is certainly a way to do this "textually". How would one do
this with patterns? Is it possible? Thank you.
>
>

```

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