Question

I have a brief question regarding the plot3 function in MatLab.

Say I write the following:

x = [1 1 -1 1];
y = [4 4 4 4];
z = [-1 1 1 -1];

plot3(x,y,z)

Why does MatLab then draw a triangle with vertices in (-1,4-1), (1, 4, -1) and (1,4,1) instead of just plotting the points (-1, 4, -1), (1, 4, -1) and (1, 4, 1)?

Answer 1

The default line style for plot and plot3 is a line, not just points. If you want to plot just the points, use a different style:

plot3(x,y,z,'or'); #% plots red circles at each point