[ncl-talk] Fwd: Query

[Kunal Bali]

How to add the valid values in scalar field. I have attached screen-shot of
running ncl. please look at that.

ncl 3> load "/usr/local/lib/ncl/lib/ncarg/nclscripts/csm/gsn_code.ncl"
ncl 4> load "/usr/local/lib/ncl/lib/ncarg/nclscripts/csm/gsn_csm.ncl"
ncl 5> begin
ncl 6> in = addfile("/home/kunal/14-01.nc","r")
ncl 7> ts = in->TotCH4_A(:,:)
ncl 8> oro = in->TotCH4_A(:,:)
ncl 9> land_only = ts
ncl 10> land_only = mask(ts,oro,1)
ncl 11> wks = gsn_open_wks("x11","mask")
ncl 12> gsn_define_colormap(wks,"BlAqGrYeOrRe")
ncl 13> res = True
ncl 14> res at cnFillOn = True
ncl 15> res at cnLinesOn = False
ncl 16> res at tiMainString = "Land Only"
ncl 17> plot = gsn_csm_contour_map_ce(wks,land_only,res)
ncl 18> end
warning:ContourPlotInitialize: no valid values in scalar field; ContourPlot
not possible:[errno=1101]


Kunal Bali
Research Scholar
Radio & Atmospheric Science Division
CSIR - National Physical Laboratory
New Delhi - 110012







On Thu, Aug 28, 2014 at 5:27 PM, Alan Brammer <abrammer at albany.edu> wrote:

> Dear Kunali,
>    The error tells you exactly what is wrong.
>
> ncl 5> oro = in->ORO(:,:)
> fatal:["Execute.c":6321]:variable (ORO) is not in file (in)
> fatal:["Execute.c":8565]:Execute: Error occurred at or near line 5
>
> You're trying to load a variable ORO from the file, but a variable by that
> name does not exist in the file.  I'd recommend running  ncl_filedump
> /home/kunal/14-01.nc   and check the variables in the file.
> Or add print(getfilevarnames(in)) to the script after you load the file.
>
>
> Once past that error, as long as oro is equal to 1 over the ocean then
> you're good. Otherwise you may want an adjustment on this example from the
> ncl webpage for  (oro.le.0)
>  ; More advanced case mask a at locations where ma0 is not-equal-to 2
>
>
> ;
>     out1 = *mask*( a, (ma0.ne.2), True)
>
> ncl 6> land_only = ts
> ncl 7> land_only = mask(ts,oro,1)
>
>
>
> Good Luck,
>
> Alan Brammer
>
>
> On Thu, Aug 28, 2014 at 7:41 AM, Kunal Bali <kunal.bali9 at gmail.com> wrote:
>
>> Hello
>> I am trying to use the masking scripts for generating data only on land.
>> but i am getting error. My scripts is given below.
>>
>> In this i am not getting the means of oro (line -5).
>> Could any one suggest me to how to correct this scripts or how to
>> visualize the data on land only.
>>
>> ncl 0> load "/usr/local/lib/ncl/lib/ncarg/nclscripts/csm/gsn_code.ncl"
>> ncl 1> load "/usr/local/lib/ncl/lib/ncarg/nclscripts/csm/gsn_csm.ncl"
>> ncl 2> begin
>> ncl 3> in = addfile("/home/kunal/14-01.nc","r")
>> ncl 4> ts = in->TotCH4_A(:,:)
>> ncl 5> oro = in->ORO(:,:)
>> ncl 6> land_only = ts
>> ncl 7> land_only = mask(ts,oro,1)
>> ncl 8> wks = gsn_open_wks("x11","mask")
>> ncl 9> gsn_define_colormap(wks,"BlAqGrYeOrRe")
>> ncl 10> res = True
>> ncl 11> res at cnFillOn = True
>> ncl 12> res at cnLinesOn = False
>> ncl 13> res at gsnSpreadColors = True
>> ncl 14> res at gsnSpreadColorStart = 10
>> ncl 15> res at gsnSpreadColorEnd = 96
>> ncl 16> res at cnLevelSpacingF = 3
>> ncl 17> res at lbLabelString = 4
>> ncl 18> res at tiMainString = "Land Only"
>> ncl 19> plot = gsn_csm_contour_map_ce(wks,land_onl,res)
>> ncl 20> end
>> fatal:["Execute.c":6321]:variable (ORO) is not in file (in)
>> fatal:["Execute.c":8565]:Execute: Error occurred at or near line 5
>>
>>
>> Thank You
>> Kunal Bali
>> Research Scholar
>> Radio & Atmospheric Science Division
>> CSIR - National Physical Laboratory
>> New Delhi - 110012
>>
>>
>>
>>
>>
>>
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>>
>
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