x=[20 20 20 20 20 20 20;21 21 21 21 21 21 21];

y=[1 2 3 4 5 6 7;3 4 5 6 7 8 9];

z=[2 3 4 5 6 7 8;4 5 6 7 8 2 3];

plot3(x.",y.",z.","-b*","LineWidth",1.5);hold on

mesh(x,y,z,"LineStyle","-."),colormap([1,0,0]),grid on,alpha(.3);

xlabel("X"),ylabel("Y"),zlabel("Z");

hold off

如果對線寬要求不高，最為簡單的是下面程式碼：

x=[20 20 20 20 20 20 20;21 21 21 21 21 21 21];

y=[1 2 3 4 5 6 7;3 4 5 6 7 8 9];

z=[2 3 4 5 6 7 8;4 5 6 7 8 2 3];

plot3(x,y,z,"-.r",x.",y.",z.","-b*");

grid on

xlabel("X"),ylabel("Y"),zlabel("Z");