MATLAB: Row vector into array.

arrayrow vecotr;

I have this A variable made up by 1×72 double.

Francesco, you could use

 A(A == 0) = [];
 B = reshape(A,8,8)

for your specially formatted matrix A, where the zeros are located at those very same positions.

A(:)

 % One of the many solutions
 t = ismember(A,'0')
 A(t)=[];