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Re: Computing Time [message #19377]

Mon, 20 March 2000 00:00

Craig Markwardt
Messages: 1869
Registered: November 1996

Senior Member

Martin Schultz <martin.schultz@dkrz.de> writes:
>
> JULDAY will give you fractional days as an answer. To convert this back
> into
> days, hours, minutes, etc., you can do:
> days = fix(diff) ; or long() if you desire
> hour = fix( (diff-days)*24. )
> minute = fix( (diff-days-hour/24.)*1440. )
> second = fix( (diff-days-hour/24.-minute/1440.)*86400. )
> just that you may run into roundoff problems here or there. And this is
> why you should probably follow Liam's advice and use the JHU APL
> routines.

Would it be wiser to use FLOOR() instead of FIX(), to handle negative
time differences? This always gets a little sticky.

Craig

--
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Craig B. Markwardt, Ph.D. EMAIL: craigmnet@cow.physics.wisc.edu
Astrophysics, IDL, Finance, Derivatives | Remove "net" for better response
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[Message index]

		Re: Computing Time By: Craig Markwardt on Mon, 20 March 2000 00:00
		Re: Computing Time By: Martin Schultz on Mon, 20 March 2000 00:00
		Re: Computing Time By: Brian Jackel on Fri, 17 March 2000 00:00
		Re: Computing Time By: Liam E. Gumley on Fri, 17 March 2000 00:00

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