matrix in matlab enquiry

[ill2000m]

I am a new user in matlab . just wonder if anyone know how to use matrix in matlab to do the following

i got 12 and wish to turn it into 1122
34 1122
3344
3344

like the following .. i dont know which matlab command i should use
12
34
=
1122
1122
3344
3344

 

[MikeyP]

This should work for your 2x2 case. I'll leave it to you to extend it to nxn.

A = [1 2
     3 4]

X = [1 0
     1 0
     0 1
     0 1]

B = X*A*X'

M

--
Dr Michael F Platten