Is there a bug in quiver?

Dear Sirs

It seems to me that the plot should be wrong because there are two rows of vectors pointing down, when everithing is positive. Is there a bug in the quiver plot function?

Sincerely

Manuel Cornejo

[Francesco Michelotti]

I have a problem too with quiver. Everything works well if you invert u and v. I'm checking right now.

Answer 1

[the cyclist]

It seems to me the problem is that you used matrix operations when you intended array operations. Try this instead:

u = y./sqrt(x.^2+y.^2);
v = x./sqrt(x.^2+y.^2);

See this documentation for details.

[Manuel Cornejo Muñoz]

I am a beginner. Thank you very much