How can I use '&' between two different matrix ?

For example

aa =

     1     2     3
     4     5     6

bb =

     1     2
     3     4
     5     6

And I wanna create cc = aa & bb; But there's some problem they said ..

What does it means ? And how can i fix it ?

[Walter Roberson]

What would you like the result to be? Do you want the result to be 2 x 3 like aa ? 3 x 2 like bb ? 2 x 2 because that is what they have in common? 3 x 3 by extending to the limits of both?

Answer 1

[KSSV]

The dimensions of aa and bb are different. aa is 2X3 and bb is 3x2.. you have to transpose any of the matrix.

Eg:

cc = aa' & bb

or

cc = aa & bb'