Permute a Matrix

PERMM Permutates a matrix A by given indexes by computing B = P'*A*P

B = permm(A,indx)
[B,P] = permm(A,indx)

The function applies simultaneous column and row permutation, that is by
given indexes indx = [k j m ...] the function rearranges the elements of A
so that B11=Akk, B12=Akj, ... B21 = Ajk, B22=Ajj, ...

Example
A = [11 12 13 % initial matrix
21 22 23
31 32 33]
idp = [2 3 1] % order of rearrangement
B = permm(A, idp); % rearranged matrix
% B = [22 23 21
% 32 33 31
% 12 13 11]