samer@4: function B=chunk(A,n,step)
samer@4: % CHUNK: return chunk from inside matrix
samer@4: % B=chunk(A,n,hop): returns nth block of rows of size hop from A
samer@4: % A:  source matrix
samer@4: % n:  index of chunk
samer@4: % hop: size of chunk
samer@4: 
samer@4: i=n*step+1;
samer@4: B=A(i:i+step-1,:);
samer@4: 
samer@4: