MATLAB: Repeat a matrix in defined manner

Question

hi! How could i generate from this matrix:

 A=[1 2 3
    4 5 6  
    4 5 6]

this matrix:

 B= [1 1 1 1 2 2 2 2 3 3 3 3
     4 4 4 4 5 5 5 5  6 6 6 6 
     4 4 4 4 5 5 5 5  6 6 6 6]

thank you

Answer 1

A=[1 2 3;4 5 6;4 5 6];
m=4
B=cell2mat(arrayfun(@(x) x*ones(1,m),A,'un',0))