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I don't have programs like MAthematica or Maple that plot vector fields out of the box, the ones I use are Maxima and Scilab for simbolic/numeric, and none of them can easly plot 3d vector fields, so if someone can plot this one for me, I will appreciate it: $$ \left( \frac{\cot (\theta)}{r^3},\frac{1}{r^3},0 \right)$$

It's in spherical coordinates

Thanks in advance. PS: I tried with wolfram alpha but it didn't recognise it. and btw, if someone knows a good free program to do this stuff, please let me know (I used to have a license for Maple from college but I don't have it anymore)

EDIT: The spherical coordinates are in this case: $(r,\theta,\phi)$, where $\theta$ is the angle with ther vertical from 0 when it's vertical, in the direction of z axis, and $\pi$ when it's in the direction of -z axis. $\phi\in (0,2\pi)$

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how about gnuplot? – Levon Haykazyan Jan 13 '13 at 20:29
Conventions for spherical coordinates vary. You should specify which one you mean. – Rahul Jan 13 '13 at 20:34

Have you tried this online MMA Web Based tool to do a 3D Plot of Vector Fields?

You might also try have a look here and see if any of the free SW listed works for you (GNU Plot, JavaView, Visual Data...).

Have fun!


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Thanks for the tools, I never liked gnu plot, but looks like I will have to learn it. – MyUserIsThis Jan 13 '13 at 20:51
@Ferfer93: Does the MMA not work for you? – Amzoti Jan 13 '13 at 20:52
I haven't tried it yet, give me a secon, I just saw your answer – MyUserIsThis Jan 13 '13 at 20:54
This may sound stupid, but I can't use it, don't know how... – MyUserIsThis Jan 13 '13 at 21:04
Nice suggestion! I didn't know that! +1 – amWhy May 9 '13 at 0:18

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