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Re: ATAN function with two ARGS [message #20375 is a reply to message #20289]

Tue, 06 June 2000 00:00

Paul Hick
Messages: 9
Registered: November 1999

Junior Member

I presume that IDL is compiled with whatever math libraries are
available on any particular operating system, so it will inherit
whatever peculiarities (not necessarily the same on every OS) are in
there. Another example: raise NaN to a floating point power on a Windows
machine:

IDL> print, !values.f_nan^2.0
0.000000
% Program caused arithmetic error: Floating illegal operand
IDL> print, !version
{ x86 Win32 Windows 5.3.1 Feb 23 2000}

IDL on Linux, for instance, gives the proper response:

IDL> print, !values.f_nan^2.0
NaN
IDL> print, !version
{ x86 linux unix 5.3 Nov 11 1999}

Paul
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[Message index]

		ATAN function with two ARGS By: Ben Tupper on Mon, 05 June 2000 00:00
		Re: ATAN function with two ARGS By: davidf on Tue, 06 June 2000 00:00
		Re: ATAN function with two ARGS By: Paul Hick on Tue, 06 June 2000 00:00

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