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Is there any from to draw "the angle between 2 vectors in 3D" in python like this image:

http://intmstat.com/vectors/cosines.gif

,i.e., like this post: Best way to plot an angle between two lines in Matplotlib but in 3D.

Thank you very much! Any advice will be greatly appreciated.

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Carlos Diaz
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  • `Matplotlib` can draw in 3D. – furas Jan 31 '16 at 10:53
  • Thanks @furas, I have drawn some arrows in Matplotlib but I don't find about this semi-circular lines. After that, I have decided to do the main part with python and then modify with inkscape. – Carlos Diaz Mar 26 '16 at 10:09

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