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Re: Tick labels and dates [message #41839 is a reply to message #41838]

Tue, 23 November 2004 13:41

Haje Korth
Messages: 651
Registered: May 1997

Senior Member

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.

Haje

"Michael Wallace" <mwallace.no.spam@no.spam.swri.edu.invalid> wrote in
message news:10q7aj04g0ail9c@corp.supernews.com...
> I have never been good with figuring how how all the date formatting
> stuff works. I want to label the X axis on a few of my plots with some
> readable date strings. In certain cases, I'd like to display something
> of the form "HH:MI:SS". Other times I'd like to see a day of month or a
> day of year or some other variation.
>
> Anyway, assuming that I have a timestamp in the form of seconds since
> the 1970 epoch, is there some built in way to convert to the time string
> my choosing? Or will I have to role my own conversions? Secondly, how
> do I go about cleanly setting the labels on my IDLgrAxis to the strings?
>
> TIA,
> Mike

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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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