If I pick out a value from an array, how do I know which element it is?

Questions
1

Hi!

I simply am applying the Max function to an array of data, but I want to know exactly which element the maximum corresponds to. I only have Mathematica version 9, so keep that in mind (i.e. I would like to explore “MaximalBy”, but I can’t).

Thank you for your time,

-Phil

2

but I want to know exactly which element the maximum corresponds to

Many ways. One way is to use Ordering

  a = {1, 3, 4, 2, 9, 0, 2, 4}
  Ordering[a, -1]
  (*  {5} *)

So max is the 5th element. You also use Position[a, Max[a]]

3

I like when it’s easy. Thank you very much!