how to display output of all iteration of for loop in a matrix or even a array

a=[1 2 3 4 5 6 7 8 9 0]
for i=1:2:7
b=a(1,i:i+3)
end
this is the code i hve written,now i want this output in the form of a matrix. can someone help

Answer 1

[Thomas]

 a=[1 2 3 4 5 6 7 8 9 0]
count=1;
for i=1:2:7
b(count,:)=a(1,i:i+3);
count=count+1;
end
b

[ritika]

thanks a lot