Return a list of numbers used in an expression

• Subject: Return a list of numbers used in an expression
• From: Harry Kanda
• Date: Sat, 16 Jul 2005 14:03:33 +0100

Hi everyone,

I'm trying to write a function that will return a list of the numbers
used in an exp

i.e. a: 3*x^2 + 6*x + 3 + 4*y + 5*y^2 + sin(2*x)
fun(a);
[3,2,6,3,4,5,2,2] 

I'm assuming that i'll have to start down with an args breakdown, but
is there a way to say is this a number? as opposed to a var

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