MathGroup Archive 1998

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Re: unwrapping ArcTan


Linda Rogers wrote:
> 
> Is there code for "unwrapping" the ArcTan, so that one has a smooth
> function of phase that increases, adding 2 Pi every time a cycle is
> completed?
> Thanks,
> Linda Rogers

You might want to check the archives for May, 1998 for this news group

http://www.wolfram.com/cgi-bin/mathgroup/1998/May

Look for responses to message #12213, which was in essence the same as
yours but in terms of Arg rather than ArcTan. The one I liked best I
include below.

Daniel Lichtblau
Wolfram Research



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