Create a relation matrix from a sequence (Matlab)

Question

I have a sequence S :

  S= \'ABCD\' % which means A

I want to convert S into a matrix M[i,j] which have to satisfy those con

Answer 1

Here's another similar approach:

n = 4;
M = tril(rand(n)*0.5, -1);
P = triu(1-M.', 1);
M = M + P + eye(n)*0.5;

Result:

M =

   0.500000   0.987433   0.711005   0.944642
   0.012567   0.500000   0.782633   0.902365
   0.288995   0.217367   0.500000   0.783708
   0.055358   0.097635   0.216292   0.500000