How can I find the maximum value and its index in array in MATLAB?
The function is max. To obtain the first maximum value you should do
[val, idx] = max(a);
val is the maximum value and idx is its index.
For a matrix you can use this:
[M,I] = max(A(:))
I is the index of A(:) containing the largest element.
Now, use the ind2sub function to extract the row and column indices of A corresponding to the largest element.
[I_row, I_col] = ind2sub(size(A),I)
source: https://www.mathworks.com/help/matlab/ref/max.html