[ncl-talk] variable name in netCDF file

[Dennis Shea]

The reason why the following fails

    x = f->lwp37_mid-high_daynight_mon

is that NCL interprets the '-' as an algebraic operator (subtraction).
Think:

  x = f->lwp37_mid  *-*  high_daynight_mon

It looks for the variable 'lwp37_mid' which does not exist.

---
Other examples:

   x    = f->*$"*ice cream+oreo-cookies...yummy!*"$*  ; direct

   xNam = *"*ice cream+oreo-cookies...yummy!*"*
   x    = f->*$*xNam*$*
---
                            ; predefine desired variables
   vars = (/"T","U","V"/)   ; array of strings
   nvar = dimsizes(vars)

   do n=0,nvars-1
      x = f->*$*vars(n)*$*
      [snip]
   end do



On Mon, Jul 23, 2018 at 9:48 PM, Rashed Mahmood <rashidcomsis at gmail.com>
wrote:

> May be try using the $$ syntax:
> e.g.
>
>  infil = addfile("abc.nc","r")
>
>  vname = "lwp37_mid-high_daynight_mon"
>
>  varb = infil->$vname$
>
>
> Cheers,
> Rashed
>
>
>
>
>
>
>
>
> On Mon, Jul 23, 2018 at 8:27 PM, Laura Fowler <laura at ucar.edu> wrote:
>
>> Hello:
>>
>> I am trying to read two variables in a NetCDF file. One is named  "lwp37_high_daynight_mon"
>> and I do not have any issue to read it.
>>
>> The other one is named "lwp37_mid-high_daynight_mon" for which ncl
>> (6.4.0) an error message. I do not have any issue using ncdump with this
>> variable. Does ncl has an issue reading variable that a name with a mix of
>> "_" and "-" sign.
>>
>> This is the only thing I can think of.
>>
>> Many thanks,
>> Laura
>>
>>
>> --
>> !-----------------------------------------------------------
>> --------------------------------------------------
>> Laura D. Fowler
>>
>> Mesoscale and Microscale Meteorology Division (MMM)
>> National Center for Atmospheric Research
>> P.O. Box 3000, Boulder CO 80307-3000
>>
>> e-mail: laura at ucar.edu
>> phone: 303-497-1628
>>
>> !-----------------------------------------------------------
>> --------------------------------------------------
>>
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>
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