MATLAB: If i have two matrix in different size how can i subtract it By adding zeros row or column ?

functionMATLABmatlab functionmatrix

if i have n X m matrix like this (6,6) i want to make the X in size (6,m/2) by adding zeros row and column
 X_before = [ 1 2 
              1 1
              2 1 ]
so
 X_after = [ 1 2 0 
             1 1 0
             2 1 0
       0 0 0
       0 0 0
       0 0 0 ]
AND i want to this matrix Z to be (n/2,6) like
        Z_before = [ 0 1 1 2 
                     1 1 2 1 ]
       Z_after = [  0 0 0 0 0 0
                    0 1 1 2 0 0
                    1 1 2 1 0 0 ]

Best Answer

x=[1  2  3;4 5 6]
You can add zeros horizontally
n=3
x=[x zeros(size(x,1),n)]
or vertically
x=[x;zeros(n,size(x,2))]
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