+ xx = [ zeros(1,3), linspace(0,1,5), ones(1,4) ] This code is first assigning three zeros to xx using zeros(1,3)--- linspace(0, 1, 5) is generating 5 points between 0 and 1--- and at the end ones(1,4) is assigning four ones to Xx. Result: XX = Columns 1 through 7