It would be nice to have the ‘z’ matrix as well, however in its absence, I will create one.
x=[0.2;0.5;0.8;1;1.5];
y=[0;0.2;0.4;0.6;0.8];
z = x*y.';;
figure
surf(x, y, z)
grid on
xlabel('x')
ylabel('y')
Use semicolons (;) not colons (:) to do vertical concatenation. They are two entirely different operators, and are used for entirely different purpoases.
.
