retrieving vpage info

[Muthuvel Chelliah]

Charles,

Since I posted, without getting into details, let me say,
I am able to do what I wanted to do.

Thanks much for your attention. Good day.

Muthu

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Muthuvel Chelliah		    eMail: Muthuvel.Chelliah at noaa.gov
Rm.605A, Climate Prediction Center         Ph: (301) 763-8000 X 7546
NCEP/NWS/NOAA/U.S.Dept. of Commerce  FAX:  (301) 763-8395
5200 Auth Road,  NOAA Science Center
Camp Springs, MD 20746-4304
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Charles Seman wrote:
> Muthuvel,
>
> I'm not sure what you might be doing, but here's some code based on a 
> technique to shade missing (undef) values a specific color
> from a post to the GrADS Listserv by Arindam Chakraborty on  Thu, 23 
> Jan 2003: Arindam Chakraborty <arch at CAOS.IISC.ERNET.IN>
> ---
> var_clevs=  ' -32  -16  -8  -4  -2  -1   1   2   4   8  16  32'
> var_ccols = '9   14    4   11  5  13   0  10  7   12  8   2   6' ;* 
> note "0" for var_clevs between -1 to 1; see 
> http://grads.iges.org/grads/gadoc/colorcontrol.html
> ...
> 'set vpage 0.0 8.5 0.0 3.5'
> 'set parea 1.0 7.0 0.4 3.0'
> display_var('var',var_clevs,var_ccols)
> ...
> function display_var(var,var_clevs,var_ccols)
> *
> *  technique to shade missing (undef) values a specific color
> *  from a post to the GrADS Listserv by Arindam Chakraborty on
> *  Thu, 23 Jan 2003: Arindam Chakraborty <arch at CAOS.IISC.ERNET.IN>
> *
> 'set grads off'
> 'set gxout shaded'
> 'd 'var
> 'q gxinfo'
>  xlin = sublin(result,3)
>  ylin = sublin(result,4)
>  xl = subwrd(xlin,4)
>  xh = subwrd(xlin,6)
>  yl = subwrd(ylin,4)
>  yh = subwrd(ylin,6)
> 'set rgb 16 220 220 220'
> 'set line 16'
> 'draw recf 'xl' 'yl' 'xh' 'yh
> 'set clevs 'var_clevs
> 'set ccols 'var_ccols
> 'd 'var
> 'cbar 0.7'
>
> return
> ---
>
> Hope this helps,
> Chuck
>
> Muthuvel Chelliah wrote:
>> The "q gxinfo" tells if it is a landscape or portrait by giving the 
>> "page
>> size" as 11 by 8.5 OR 8.5 by 11. But If I subdivide the total page 
>> plot area
>> into multiple regions (say for example to display multiple x-y plots 
>> in a
>> page) is there any command to give me back the "vpage" dimensions (I 
>> mean:
>> xmin xmax ymin ymax) that are being used. In other words, once a 'set 
>> vpage
>> is declared (computed from within another script and set there - this 
>> script
>> is called from the main script) how do I get that vpage info in the main
>> script. I hope this is not confusing. Thanks much for your  time.
>> Muthu
>>   
>