[ncl-talk] Issues adding variables to chart

[Rick Brownrigg]

...last one got away from me too quick...as I was saying...

Steven,

Yes it looks like the missing values is the culprit in your case; for more
check out:


http://ncl.ucar.edu/Document/Manuals/Ref_Manual/NclExpressions.shtml#MissingValues

In any case, assuming var2 is the variable with missing values, then
perhaps try something like:

   var = where(ismissing(var2), var1, var1 + var2)

Hope that helps...
Rick

On Thu, May 7, 2015 at 9:16 AM, Rick Brownrigg <brownrig at ucar.edu> wrote:

> Hi Steven,
>
> Yes a quick test indicates that the missing_values is the culprit (for
> more, check out:
>
>
> On Thu, May 7, 2015 at 8:13 AM, BLIUJUS, STEVEN D CTR USAF AFMC
> AFLCMC/HBAW-OL <steven.bliujus.3.ctr at us.af.mil> wrote:
>
>> I am trying to take two files and add the variables together. One variable
>> has data over water while the other has missing values, when I try adding
>> the values, nothing prints out for the areas over the ocean. I tried
>> setting
>> the variables to 0 instead of missing values but that did not work
>> either. I
>> have attached three images: var1, var2, and var. The variable var is the
>> addition, and the addition gets done over land but not over water. Not
>> sure
>> why this is occurring, my only guess is the struggle with missing data.
>> However, when I look at var, it doesn't look as though it is adding the
>> variables properly either since the max for var is 2.49807, but the max
>> for
>> var2 is 2.544, so there is an obvious discrepancy. Here is my info:
>>
>> 1. I am using Version 6.1.2
>> 2. My Script:
>>
>> load "/home/bliujuss/ncl/lib/ncarg/nclscripts/csm/gsn_code.ncl"
>> load "/home/bliujuss/ncl/lib/ncarg/nclscripts/wrf/WRFUserARW.ncl"
>> load "/home/bliujuss/ncl/lib/ncarg/nclscripts/csm/gsn_csm.ncl"
>> begin
>>
>> a=addfile("/home/bliujuss/Plots/MYD08_D3.051.timeAverage.1.nc","r")
>> b=addfile("/home/bliujuss/Plots/MOD08_D3.051.timeAverage.0.nc","r")
>> wks = gsn_open_wks("x11","plt_aod")
>> gsn_define_colormap(wks,"3gauss")
>>
>> var1 = a->Deep_Blue_Aerosol_Optical_Depth_550_Land_QA_Mean(:,:)
>> var2 = b->Optical_Depth_Land_And_Ocean_Mean(:,:)
>>
>> printVarSummary(var1)
>> printMinMax(var1, True)
>> printVarSummary(var2)
>> printMinMax(var2, True)
>>
>>
>> var = var1
>> var = 0.0
>> var = var2+var1
>>
>> printVarSummary(var)
>> printMinMax(var, True)
>>
>> pltres = True
>> pltres at tiMainString = "AOD550"
>> pltres at cnFillOn = True
>> pltres at gsnSpreadColors = False
>> pltres at gsnAddCyclic = False
>>
>> pltres at cnLineLabelsOn = False
>> pltres at cnLineLabelBackgroundColor = "white"
>> ;plot = gsn_csm_contour_map_ce(wks,var({-46.2:46.5},{-4.5:184.5}),pltres)
>> ;plot = gsn_csm_contour_map_ce(wks,var1({-46.2:46.5},{-4.5:184.5}),pltres)
>> ;plot = gsn_csm_contour_map_ce(wks,var2({-46.2:46.5},{-4.5:184.5}),pltres)
>> End
>>
>> 3. Files are attached
>>
>> 4. Images attached
>>
>> 5. No error message
>>
>> 6. gcc (GCC) 4.1.2 20080704 (Red Hat 4.1.2-44)
>>
>>
>>
>> Steven Bliujus, Contractor
>> SEMS/16WS WXE
>> 557th Weather Wing
>> DNS: 232-7151
>>
>>
>>
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>
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