matlab exchange matrix

>> % Project 2
>> % Owise Kyaw Min Oo
>> 
>> x=0:4;
>> y=5:5:25;
>> z=[x y]

z =

     0     1     2     3     4     5    10    15    20    25

>> f=[x' y']

f =

     0     5
     1    10
     2    15
     3    20
     4    25

>> %change roe to column
>> z(1)=1;
>> %change first value in the matrix z from 0 to 1
>> a=f(:,1);
>> % : = all row // first column
>> b=f(1:2 , 2:1);