matlab - Index of max and min value in an array

Question

How can I find the index of the maximum element in an array without looping?

For example, if I have:

a = [1 2 999 3];

I want to define a function indexMax so that indexMax(a) would return 3.

Likewise for defining indexMin.

Answer 1

The built-in max function has this functionality when two output arguments are specified:

a = [1 2 999 3];
[the_max, index_of_max] = max(a)

the_max =

   999


index_of_max =

     3

Likewise for min.