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Is there a fast Complex ATAN in IDL 5.5? [message #31731]

Thu, 15 August 2002 16:57

MKatz843
Messages: 98
Registered: March 2002

Member

I've avoided switching to IDL 5.5 for some time now because I use
ATAN() to produce the phase of complex data. In my simple tests with
IDL 5.4,

ATAN(x) runs over 30% faster than
ATAN(imaginary(x),float(x)).

I use ATAN() a great deal, and in real-time feedback applications with
512x512 arrays where time is important.

Does anyone know

(A) Is there a new, fast ATAN() available that can process my complex
data a la IDL 5.4?
(B) Is there a way to hack the IDL libraries to put the old ATAN
function into the newer IDL library to recover the old behavior?

Thanks,

M. Katz

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		Is there a fast Complex ATAN in IDL 5.5? By: MKatz843 on Thu, 15 August 2002 16:57
		Re: Is there a fast Complex ATAN in IDL 5.5? By: the_cacc on Tue, 20 August 2002 17:43

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