matrix index (I tried to name a matrix to use in a loop like variables.)

I tried to name a matrix to use in a loop like variables.

forexample A(1)=[1 2;3 4]

                 A(2)=A(1)*2
                  A(3)=A(2)*2
                    .
                    .
                    .
                  A(j)=A(j-1)*2

But I can't use the notation A(j) in the loop. what should I call the j of A?

Answer 1

[Azzi Abdelmalek]

You can use cell arrays

A=cell(1,4)
A{1}=[1 2;3 4]
for k=2:numel(A)
 A{k}=A{k-1}*2
end

[Sakunrat Jaejaima]

Thank you .

Answer 2

[Andrei Bobrov]

A=[1 2;3 4];
jj=9;
A = bsxfun(@times,A,2.^reshape(0:jj-1,1,1,[]));

[Sakunrat Jaejaima]

Thank you.