Sum all the numbers between two indices in Matlab

Question

My 1x500 matrix consist of numbers, I want to sum all the numbers between two indices, lets say between 100 and 300. Forgot how to do that, help would be appreciated.

Answer 1

Let's say we have the matrix:

m = [1,2,3,4,5,6,7,8];

and indices:

idx1 = 3;
idx2 = 6;

Getting the sum is easy:

sum(m(idx1:idx2))

So the answer to your question is:

ans = sum(your_m1x500(100:300));