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Re: Using [XYZ]TICKFORMAT for dynamic formatting [message #66486 is a reply to message #66478]

Wed, 20 May 2009 05:29

David Gell
Messages: 29
Registered: January 2009

Junior Member

On May 19, 10:09 am, Paul van Delst <paul.vande...@noaa.gov> wrote:
> Hello,
>
> Given the following xtickformat function,
>
> FUNCTION lowticks, axis, index, value
> RETURN, STRING( value, FORMAT = '("!C",f7.3)' )
> END
>
> I am doing something like the following to get the x-axis tick labels on every other plot
> printed on the next line:
>
> !P.MULTI = [0,n_xplots,1]
> !X.OMARGIN = [10,3]
> !X.MARGIN = [0,0]
> !Y.OMARGIN = [2,0]
> !Y.MARGIN = [4,2]
>
> FOR i = 0, n_xplots-1 DO BEGIN
> IF ( i EQ 1 OR i EQ 3 ) THEN BEGIN
> xtickformat = 'lowticks'
> ENDIF ELSE BEGIN
> xtickformat = ''
> ENDELSE
>
> PLOT, x, y, XTICKFORMAT = xtickformat
>
> ...etc...
>
> to prevent the end-of-axis tick labels from adjacent plots overwriting each other.
>
> The problem is that I want the format in the "lowticks" function, the "f7.3", to be the
> same as those automagically chosen by IDL in the plots where the xtickformat defaults.
>
> Does anyone know if there is any way to dynamically set the format string itself in this
> fashion? I.e. pass in the "f7.3" (or f4.1 or f5.2 etc) ?
>
> cheers,
>
> paulv

I usually do something like the following when I have to pass data to
a callback routine.
Change the lowticks routine as follows:

FUNCTION lowticks, axis, index, value, format=format
common qqlowticks, sFormat
if n_elements(sFormat) eq 0 then sFormat='("!C",f7.3)' ;;
initialize state memory
if keyword_set(format) ne 0 then begin
sFormat=format
return, 0
endif

RETURN, STRING( value, FORMAT = sFormat
END

Then, prior to using lowticks as the value of the xtickformat keyword
argument, you set the
format string,

nDummy=lowticks(format='(F7.3)'

plot, ..., xtickformat=lowticks

Hope this helps.

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[Message index]

		Re: Using [XYZ]TICKFORMAT for dynamic formatting By: David Gell on Thu, 21 May 2009 05:27
		Re: Using [XYZ]TICKFORMAT for dynamic formatting By: David Fanning on Wed, 20 May 2009 20:14
		Re: Using [XYZ]TICKFORMAT for dynamic formatting By: Mark[1] on Wed, 20 May 2009 16:40
		Re: Using [XYZ]TICKFORMAT for dynamic formatting By: David Gell on Wed, 20 May 2009 05:29
		Re: Using [XYZ]TICKFORMAT for dynamic formatting By: lbnc on Tue, 19 May 2009 23:56
		Re: Using [XYZ]TICKFORMAT for dynamic formatting By: Paul Van Delst[1] on Thu, 21 May 2009 14:38
		Re: Using [XYZ]TICKFORMAT for dynamic formatting By: Paul Van Delst[1] on Thu, 21 May 2009 14:40
		Re: Using [XYZ]TICKFORMAT for dynamic formatting By: David Gell on Fri, 22 May 2009 11:42
		Re: Using [XYZ]TICKFORMAT for dynamic formatting By: Paul Van Delst[1] on Thu, 21 May 2009 14:14
		Re: Using [XYZ]TICKFORMAT for dynamic formatting By: Mark[1] on Thu, 21 May 2009 15:28

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