MATLAB: Calling a value in a matrix

Question

I have two sets

X Y

1 2

3 6

4 7

5 8

I have to find highest value in category Y which is 8, after finding that 8 is the highest value I have to call value 5 in category X to from a matrix [ 5 8].

I know how to find the largest value, but I don’t know how to call 5 from X category.

Please can someone help me in call the specified value.

Answer 1

Let 's try

X = [1 3 4 5];
Y = [2 6 7 8];
[max_val, idx] = max(Y);
X_idx = X(idx);