How to make an array which plots certain points if another column has a certain value?

Hey,

I have two arrays in which the velocity and the corresponding position of a point are noted. If the velocity is zero, the position of that point has to be plotted. If the velocity is not zero, the position of that point should not be plotted.

Does anybody know how to do this?

Thanks!

Answer 1

[dpb]

"Logical addressing"...

isv=(v~=0);           % the logical addressing vector for v
plot(p(isv))          % plot the points (vs ordinal number)
plot(v(isv),p(isv))   % plot the points (vs velocity at point)