[ncl-talk] How to read a specific variable name

[Will Hobbs]

Laura

When both reading and writing to netcdf, you can use ‘$’ to access a variable name from a string e.g.:

 field = “cldfrac”
 diag = f-> $field$

For file output:
 fo->$field$ = (/ diag /)

This is described in NCL reference manual : http://www.ncl.ucar.edu/Document/Manuals/Ref_Manual/NclVariables.shtml#FileStringRef


Will


On 30/11/2016, 11:24 AM, "ncl-talk-bounces at ucar.edu on behalf of Laura Fowler" <ncl-talk-bounces at ucar.edu on behalf of laura at ucar.edu> wrote:

    Hello:

    I am trying the following command line:

    ncl 'filename="2621442.cldfrac.mp_thompson_aerosols.2011-01-31_18.00.00.nc"'
    'date="2011-01-31_18.00.00.nc"' 'field="cldfrac"'
    write.rectangular.toNETCDFs.ncl in which the variable cldfrac is the
    actual name of the variable I would liked to read.

    Inside the ncl script write.rectangular.toNETCDFs.ncl, how do I read
    that variable using the generic variable field? I tried something like
    diag = f->"field" and other combinations bu that did not work.

    When I write a new netcdf file out, how do I use
    ncdf->field = ....

    Looks like I always come up with a syntax error and have not been able
    to fix it.

    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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