Rectify matrix sizes

RECTIFY takes a set of input matrices and produces as output a set of REPMAT'ed matrices such that all matrices have the same dimensions. This is similar to NDGRID is some respects, but the inputs are not just vectors of values to expand (although it can be used that way).

For example,

a = [0 1 2 3 4 5
6 7 8 9 10 11];
b = [11 12
13 14
15 16
17 18];

[A,B] = RECTIFY(a,b);

produces:

A = [0 1 2 3 4 5
6 7 8 9 10 11
0 1 2 3 4 5
6 7 8 9 10 11];

and

B = [11 12 11 12 11 12
13 14 13 14 13 14
15 16 15 16 15 16
17 18 17 18 17 18];

This function is most useful when creating high order matrices of input combinations for vectorized functions.