Avoid combination between elements from the same category

Dears,

I would like to combine elements from a matrix. These elements are categorized and elements from the same category cannot be combined.

Modules = ({'M1'; 'M1'; 'M1'; 'M2'; 'M2'})     %Matrix with my categories
MI = ({'A'; 'B';'C';'D';'E'})   %Matrix with my elements 
B = nchoosek(MI, 2)

T =

5×2 table

Modules MI

_______ ______________________

'M1' 'A'

'M1' 'B'

'M1' 'C'

'M2' 'D'

'M2' 'E'

Table T shows in which categoy of module each MI is comprised.

I want to create a matrix B in which I will combine 2 elements by row, excluding all combinations of elements from the same category of module.

Could you help me ?

Thanks in advance,

Answer 1

[Walter Roberson]

[P,Q] = ndgrid({'A', 'B', 'C'}, {'D', 'E'});
[P(:), Q(:)]

[Rachel Sabioni]

Dear Mr. Walter,

It worked very well. Thank you so much for your help !

Rachel