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Re: Tick mark label with !P.Multi [message #76514]

Fri, 17 June 2011 10:14

Jeremy Bailin
Messages: 618
Registered: April 2008

Senior Member

On Friday, June 17, 2011 11:43:58 AM UTC-4, Alexa wrote:
> Could you explain how you're defining on_bottom_line?
>
> On Jun 17, 10:59 am, Jeremy Bailin <astro...@gmail.com> wrote:
>> So only do it when you're on those plots... which in this case, is when nt is 18 or 19. Or more generally:
>>
>> on_bottom_line = (nt / !p.multi[1]) eq (!p.multi[2] - 1)
>> if on_bottom_line then format='(A1)' else format=''
>> plot, ......., xtickformat=format, ....
>>
>> -Jeremy.

If you have NX by NY panels, IDL starts at the top-left and goes right, and then down to the next line, etc. So the index "nt" in your for loop is related to the Xi, Yi panel by:

nt = Xi + NX * Yi

You want the ones where Yi is equal to NY-1. Since nt and NX are integers and Xi is always less than NX, you have Yi = (nt / NX). So the code tests whether (nt / NX) is equal to NY-1.

-Jeremy.

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[Message index]

		Re: Tick mark label with !P.Multi By: Jeremy Bailin on Fri, 17 June 2011 10:14
		Re: Tick mark label with !P.Multi By: Gray on Fri, 17 June 2011 09:15
		Re: Tick mark label with !P.Multi By: Alexa on Fri, 17 June 2011 08:43
		Re: Tick mark label with !P.Multi By: Jeremy Bailin on Fri, 17 June 2011 07:59
		Re: Tick mark label with !P.Multi By: Alexa on Fri, 17 June 2011 07:44
		Re: Tick mark label with !P.Multi By: Jeremy Bailin on Fri, 17 June 2011 07:22

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