How to concatenate two matrices?

I have two matrices

e.g.,

A=[1 2;3 4]

B=[5 6;7 8]

how to concatenate A and B such that

C=[1 2;5 6;3 4;7 8]

Answer 1

[Wan Ji]

A=[1 2;3 4];
B=[5 6;7 8];
C1 = [A,B]';
C = reshape(C1, size(A,2),numel(C1)/size(A,2))'

Then

C =

     1     2
     5     6
     3     4
     7     8

[Ammy]

Thank you very much.

[Ammy]

@Wan Ji Can I go back from C to A and B, I meam if I have C how can I get back A and B

[Wan Ji]

A=C(1:2:end,:);

B=C(2:2:end,:);

[Ammy]

Thank you very much.