Shoutbox

Has anyone ever used MATLAB?

I have a matrix of electric potentials values, and used contour to draw equipotential lines. Just fine. Now, I need to draw the current lines, which are perpendicular to the equipotential lines.

I draw these 3 lines using paint, that's why it sucks, but I think you can understand.
Using quiver was very close to what I need, but it plots arrows, instead of lines.