Subscript indices must either be real positive integers or logicals, generic solution

Question

The following error occurs quite frequently:

Subscript indices must either be real positive integers or logicals

I have found ma

Answer 1

In Matlab (and most other programming languages) the multiplication sign must always be written. While in your math class you probably learned that you can write write a(a+a) instead of a*(a+a), this is not the same in matlab. The first is an indexing or function call, while the second is a multiplication.

>> a=0

a =

     0

>> a*(a+a)

ans =

     0

>> a(a+a)
Subscript indices must either be real
positive integers or logicals.