MATLAB: How to reshape a vector in a particular way

matrix manipulationreshapevector

I got a column vector

a = [a1 a2 a3 … an-1 an]'

and I wanna rearrange that in the following matrix

b = [a1 a2;a3 a4; …; an-1 an]

like the first two pairs are the rows of the matrix, any tips on how achieve this?

b=reshape(a,2,[])'

Anew = A(~cellfun(@isempty,A))

A = [1 0 1 0 0 0 1];
B = [1 1 1 0 0 0 1];
s = reshape([A;B],1,[])