[ncl-talk] confusion with reading attributes

[M P]

Thanks very much that solved this problem but another one occurred related
to scatter-plotting that I will follow-up
in a separate thread,
Mark

On Thu, Nov 21, 2019 at 4:37 PM Dave Allured - NOAA Affiliate <
dave.allured at noaa.gov> wrote:

> Mark has a netcdf file with an "at sign" embedded in a variable name.
> This is quite odd, but it is legal netcdf.
>
> This needs special quoting in NCL, because the "at sign" is an active NCL
> operator.  Special quoting is needed.  This should work:
>
>  lats = ndtooned (obsfile->$"latitude at MetaData"$(:))
>
>
> On Thu, Nov 21, 2019 at 4:27 PM Rick Brownrigg via ncl-talk <
> ncl-talk at ucar.edu> wrote:
>
>> I for one don't understand this line:
>>
>>   float latitude at MetaData(nlocs) ;
>>
>> Could you perhaps open the file and provide the output from
>> "printVarSummary(obsfile)" ??
>>
>> Rick
>>
>>
>> On Thu, Nov 21, 2019 at 4:02 PM M P via ncl-talk <ncl-talk at ucar.edu>
>> wrote:
>>
>>> Hello,
>>>
>>> I have a file in the following format
>>> netcdf aod_viirs_obs_2018041500_f {
>>> dimensions:
>>>         nvars = 1 ;
>>>         nlocs = UNLIMITED ; // (27545 currently)
>>> variables:
>>>          ....
>>>         float latitude at MetaData(nlocs) ;
>>>
>>> with  latitude at MetaData just being a variable name
>>>
>>> That is falsely being read as an attribute with a code
>>>
>>>  obsfile   = addfile("./indata/aod_viirs_obs_2018041500_s.nc4","r")
>>>    ; lons, lats, AOD
>>>  lats  =   ndtooned(obsfile->latitude at MetaData(:))    ; Pull off lat
>>>
>>> and warning/error
>>>
>>> warning:["NclAdvancedFile.c":5317]:AdvancedFileReadVarAtt: (MetaData) is
>>> not an attribute of (latitude)
>>>
>>> How to correct it so that the variable latitude at MetaData is read
>>> properly?
>>>
>>> Thanks,
>>>
>>> Mark
>>>
>>
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