Why is boundary showing me an empty array?

With the following code Matlab ejects me k = [] empty, what could be the reason?

x = [0;0;0;0,;0,;0];

y = [0;6;7;8;9;10];

k = boundary(x,y);

x2 = x(k);

y2 = y(k);

figure

hold on

scatter(x2,y2)

[Adam]

Your points form a straight line. Maybe the boundary function does not support this. From a quick scan of the function help page I can't see if it does or not.

[Christian_T]

Thanks! is there another way to display the points on the line?

[Adam]

Just plot them:

plot( x, y )