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Re: Tick labels and dates [message #41822 is a reply to message #41820]

Wed, 24 November 2004 14:23

Michael Wallace
Messages: 409
Registered: December 2003

Senior Member

> 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?

I was trying to figure out how in the world label_date was working.
Common blocks. Ugh. I am no fan of common blocks either and avoid them
like the plague.

Now that I've read through the C() it will do what I need it to do. My
problem was that it wasn't intuitively obvious for me to look up "C()".
Converting seconds since 1970 to a Julian day isn't hard. 1 Jan 1970
00:00:00 is 2440587.5 JD. Just convert the seconds to days and add it
to 2440587.5.

Now, there's the plotting part of my code. The previous examples showed
this label_date stuff, but since I'm not using that, how do I go about
creating the correct labels? If I use JD values for that axis, is there
some magic option where I can give it the format code? Or will I need
to go the ugly route and create the axis with JD, get the labels,
convert them and reset the label values?

-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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