Interleave and Deinterleave a vector into two new vectors

Question

Interleaver: Assume we have vector X= randi(1,N) I would like to split the contents of X into two new vectors X1and <

Answer 1

I think the terminology in this question is reversed. Interleaving would be to merge two vectors alternating their values:

x1 = 10:10:100;
x2 = 1:1:10;
x = [x1;x2];
x = x(:).';

This is the same as the one-liner:

x = reshape([x1;x2],[],1).';

Deinterleaving would be to separate the interleaved data, as already suggested by David in a comment and Tom in an answer:

y1 = x(1:2:end);
y2 = x(2:2:end);

but can also be done in many other ways, for example inverting the process we followed above:

y = reshape(x,2,[]);
y1 = y(1,:);
y2 = y(2,:);

To verify:

isequal(x1,y1)
isequal(x2,y2)