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Re: polar coordinates from [-pi, pi] to [0, 2 pi]

From: Andreas Weber
Subject: Re: polar coordinates from [-pi, pi] to [0, 2 pi]
Date: Sun, 24 Feb 2019 13:22:39 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.5.1

Am 24.02.19 um 12:42 schrieb insafba:
  the data was firstly an x/y cartesian coordinates, which I transform to
polar coordinates ( theta, radius). here is it in the file.

okay, as I see theta goes from -pi/2 to pi/2. Do you only have a half-circle or there is a problem with your calculation form x/y to r/phi

radius jumps around +/-9, see the sign change which also indicates a problem. See plot (radius)

Try first to fix this.


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