MATLAB: How can i get the index of all matrix value

Question

hello!

i have a matrix A , i want to find the index of all value in the matrix not a specific value like shown in B

A=[7 9 10 12 14 B=[1 1 1 1 1

20 25 30 17 15 2 2 2 2 2

27 10 32 28 8 3 3 3 3 3

11 13 26 34 16] 4 4 4 4 4]

Answer 1

Are you looking for something like this

A;
B = repmat((1:size(A,1)).', 1, size(A,2))