Use a nx2 matrix to indicate desired positions on another matrix

Hello everyone,

I have a quick question, how can i use the matrix lets say

pos = [1 2; 3 3];

as a guide to change the values of another matrix lets say

val = zeros(3);

avoiding for loops. What i want is something like var(pos(1,end,:)) = "some value"

Answer 1

[Matt J]

 var(sub2ind(size(var), pos(:,1), pos(:,2))) = newvalue;

[Raldi]

Thanks...