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Re: Tick labels and dates [message #41823 is a reply to message #41822]

Wed, 24 November 2004 13:34

Mark Hadfield
Messages: 783
Registered: May 1995

Senior Member

Haje Korth wrote:
> Mike,
> you want to look at the examples given for the LABEL_DATE function. It
> assumes that you have time array as Julian day. If you don't (and who does)
> you will have to do your own conversion. I keep my time usually as CDF
> epoch, so I wrote myself a little function that converts CDF epoch first to
> year, month, day, hh, mm, ss with cdf_epoch and then use julday to calculate
> the julian day from these data. Now conversion is pretty much transparent
> without having to worry what Julian day means. LABEL_DATE is pretty flexible
> in the date format and you can easily switch between the formats you like.
> AFAIK, there is no other build-in functionality for time axis.

I'm not a fan of LABEL_DATE, mainly because it uses a common block, so
there is endless scope for confusing interactions between apparently
unrelated graphs. I think that it is much simpler and safer to use the
C() calendar-format codes directly in your axis's TICKFORMAT string. You
will need to convert your time data to Julian Days, but how hard is that?

--
Mark Hadfield "Ka puwaha te tai nei, Hoea tatou"
m.hadfield@niwa.co.nz
National Institute for Water and Atmospheric Research (NIWA)

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[Message index]

		Re: Tick labels and dates By: Mark Hadfield on Wed, 24 November 2004 16:18
		Re: Tick labels and dates By: Michael Wallace on Wed, 24 November 2004 14:23
		Re: Tick labels and dates By: Mark Hadfield on Wed, 24 November 2004 13:34
		Re: Tick labels and dates By: R.Bauer on Wed, 24 November 2004 00:58
		Re: Tick labels and dates By: David Fanning on Tue, 23 November 2004 14:01
		Re: Tick labels and dates By: Haje Korth on Tue, 23 November 2004 13:41

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