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.

Nevermind.

I defined:

MATLAB code:

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[DX, DY] = gradient(m) %m is the matrix.
streamslice(DX, DY);

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I started using it, but not that advanced.

Advanced? I started last week...