| Re: Tick mark label with !P.Multi [message #76514] |
Fri, 17 June 2011 10:14 |
Jeremy Bailin
Messages: 618
Registered: April 2008
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Senior Member |
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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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| Re: Tick mark label with !P.Multi [message #76515 is a reply to message #76514] |
Fri, 17 June 2011 09:15  |
Gray
Messages: 253
Registered: February 2010
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Senior Member |
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On Jun 17, 11:43 am, Alexa <alexa7...@gmail.com> wrote:
> Could you explain how you're defining on_bottom_line?
>
> On Jun 17, 10:59 am, Jeremy Bailin <astroco...@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.
Why don't you use MULTIPLOT from the NASA IDL Astro Library?
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| Re: Tick mark label with !P.Multi [message #76516 is a reply to message #76515] |
Fri, 17 June 2011 08:43 |
Alexa
Messages: 8
Registered: June 2011
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Junior Member |
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Could you explain how you're defining on_bottom_line?
On Jun 17, 10:59 am, Jeremy Bailin <astroco...@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.
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| Re: Tick mark label with !P.Multi [message #76519 is a reply to message #76516] |
Fri, 17 June 2011 07:59 |
Jeremy Bailin
Messages: 618
Registered: April 2008
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Senior Member |
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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.
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| Re: Tick mark label with !P.Multi [message #76520 is a reply to message #76519] |
Fri, 17 June 2011 07:44 |
Alexa
Messages: 8
Registered: June 2011
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Junior Member |
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On Jun 17, 10:22 am, Jeremy Bailin <astroco...@gmail.com> wrote:
> xtickformat='(A1)'
Thanks for replying Jeremy but that makes all the tick mark labels go
away. I have an image with two columns of plots and I would like for
only the bottom two plots to have labels. Here is a stripped down
version of my plotting code if that helps.
!P.Multi=[0,2,10,0,1]
;;Plot radial velocities for each absorption feature
FOR nt=0, N_ELEMENTS(Transition)-1 DO BEGIN
ReadCol, Transition[nt], wavelength, flux, sigma, format='f,f,f'
plot, Velocity, flux, xrange=[-500, 500], xstyle=1, xminor=1,
yminor=1,$
ytickformat='(a1)',xtickformat='(a1)', psym=10
oplot, Velocity, sigma
xyouts, 300, 0, Transition[nt]
ENDFOR
!P.Multi=0
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