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I have the following coordinates stored in arrays that I want to convert into polar coordinates :

import numpy as np

R = 1.;
NcellB = 5;
xm = np.linspace(-R, R,NcellB);
ym = np.linspace(-R, R,NcellB);

Is there a simple and fast way to do it?

Improve this question
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  • You can find an answer here stackoverflow.com/a/26757297/14280520. Commented Oct 22, 2020 at 14:03
  • I saw this already, it is defined for a single couple (x, y). I was looking for a better way without having to use two for loops, which costs a bit in calculating time... Commented Oct 22, 2020 at 15:25
  • Both np.sqrt and np.arctan2 accept array as input, so no for loop is required. Commented Mar 6, 2023 at 2:54
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