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Re: ATAN for [0,2PI] range [message #20243 is a reply to message #20237]

Mon, 29 May 2000 00:00

John-David T. Smith is currently offline

John-David T. Smith
Messages: 384
Registered: January 2000

Senior Member

Luis Alonso wrote:
>
> i need for some calculations the ATAN function solved on the [0, 2PI]
> interval
> is there any direct way to do it?
>
> thanks
> Luis =)

ang=atan(Y,X)+(Y lt 0.?2*!PI:0.)

Or if you can live with [-PI,PI] then the regular atan(Y,X) will suffice. Note
that if you have only one argument (Y/X precomputed), you cannot recover the
quadrant.

JD

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J.D. Smith |*| WORK: (607) 255-5842
Cornell University Dept. of Astronomy |*| (607) 255-6263
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		Re: ATAN for [0,2PI] range By: Mark Elliott on Tue, 30 May 2000 00:00
		Re: ATAN for [0,2PI] range By: John-David T. Smith on Mon, 29 May 2000 00:00

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