[gradsusr] Request is completely outside file limits

[Tereza Cavazos]

Possibly it is better not to define any level, just the time, do not 
define the winds, make the difference directly:

'set t 26353 26712'
'd uwnd.2-uwnd.1'
'draw title..."

On 8/4/2011 9:53 PM, Dave Allured wrote:
> These two lines are missing file number references:
>
> 'define u=ave(uwnd,t=26353,t=26712)'
> 'define u1=ave(uwnd,t=26353,t=26712)'
>
> Both refer to the same /default/ file; see the top of the page on
> Grads Variables in the Users Guide.  So one of the variable
> references is getting the error because you are indexing a level
> number that goes with the opposite file.
>
> Insert file numbers .1 and .2 :
>
> 'define u=ave(uwnd.1,t=26353,t=26712)'
> 'define u1=ave(uwnd.2,t=26353,t=26712)'
>
> But keep the "set lev" commands on the same lines as before.
>
> Also, when requesting help, please identify the line where the error
> happens.  If it is not already in the error message, insert "say"
> commands to locate the line with the problem.
>
> --Dave
> 1 9:
> On 8/4/20137 PM, Chidzambwa Simba wrote:
>> Dear Users,
>> I am computing average zonal wind shear for Dec73-Feb74 from NetCDF
>> files with DJF months only for all years. I am looking at shear
>> between 850mb (first file) and 200mb (second file). My grads script
>> is as follows;
>> /'reinit'
>> 'sdfopen uwndDJF_1900_2008.cdf'
>> 'sdfopen uwndDJF_200_1900_2008.cdf'
>> 'set background 1'
>> 'set annot 0 6'
>> 'set map 0 1 8'
>> 'set xlopts 0 4'
>> 'set ylopts 0 4'
>> 'set lat -60 0'
>> 'set lon 100 180'
>> 'set gxout contour'
>> 'set lev 850'
>> 'define u=ave(uwnd,t=26353,t=26712)'
>> 'set lev 200'
>> 'define u1=ave(uwnd,t=26353,t=26712)'
>> 'd u1-u'
>> 'draw title 1973-74 Average zonal DJF wind shear (m/s)'
>> 'printim ZW_Map_DJF7374.jpeg x400 y300'
>> /
>> and when I query my files this is what I get;
>> /ga->  q file 1
>> File 1 :
>> Descriptor: uwndDJF_1900_2008.cdf
>> Binary: uwndDJF_1900_2008.cdf
>> Type = Gridded
>> Xsize = 41 Ysize = 31 Zsize = 1 Tsize = 39096 Esize = 1
>> Number of Variables = 1
>> uwnd 1 t,z,y,x 6-hourly U-wind on Pressure Levels
>> ga->  q file 2
>> File 2 :
>> Descriptor: uwndDJF_200_1900_2008.cdf
>> Binary: uwndDJF_200_1900_2008.cdf
>> Type = Gridded
>> Xsize = 41 Ysize = 31 Zsize = 1 Tsize = 39096 Esize = 1
>> Number of Variables = 1
>> uwnd 1 t,z,y,x 6-hourly U-wind on Pressure Levels/
>> When I run my script I get an error message /" Data Request Warning:
>> Request is completely outside file limits"/ and I don't understand
>> why. The areal limits are correct and I have cross-checked them and
>> the time-steps are 6-hourly daily wind components. May somebody
>> assist me please?
>> Regards
>> Simba
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