Rank the entries of a matrix with codes.

Load a matrix:

[12 4 6;

7 3 8;

1 6 5;

9 2 5]

How to rank each row relative to columns with codes as:

3 1 2

2 1 3

1 3 2

3 1 2

Thank you very much.

Answer 1

[Walter Roberson]

A = [12 4 6; 
7 3 8; 
1 6 5;
 9 2 5]

A = 4×3

12 4 6 7 3 8 1 6 5 9 2 5

[~, idx] = sort(A, 2)

idx = 4×3

2 3 1 2 1 3 1 3 2 2 3 1

[~, rank] = sort(idx, 2)

rank = 4×3

3 1 2 2 1 3 1 3 2 3 1 2