Re: help with NCL

From: Ethan Alpert (ethan AT XXXXXX)
Date: Tue Dec 16 2003 - 07:47:37 MST

  • Next message: Rick Grubin: "Re: help with NCL"

    You must add ".grb" to your file name. Because formats like grib do not
    support a magic number there is no way for NCL to know what type of file you
    are opening. You must tell it what file type it is by adding the appropriate
    extension (i.e. .grb, .nc, .ccm, .hdf) to the filename parameter of the
    addfile function:

    thefile = addfile("/data/pgb.f0002073012.grb","r")

    -e

    > hi, Sylvia:
    >
    > I am trying to do as you said. I used addfiles and then
    > ListSetType to combine the GRIB files, but got an message related to
    ListSetType:
    >
    > fatal:An internal error has occurred. The file format requested does not
    > appear to be supported, could not open (/data/pgb.f0002073012)
    >
    > what is your suggestions about this? Thanks!!
    >
    > hui
    >
    >
    > On Fri, 12 Dec 2003, Sylvia Murphy wrote:
    >
    > > >
    > > h,
    > >
    > > there are no grib equivilant of the netCDF operators. you will have to
    use
    > > NCL for that.
    > > read in all the files using addfiles and then use dim_avg.
    > >
    > > http://www.cgd.ucar.edu/csm/support/FH/addfiles.shtml
    > >
    > > remember to reorder your variable to put time as the rightmost
    dimension.
    > > you should also use dim_avg_Wrap located in contributed.ncl so that your
    > > meta data is preserved.
    > >
    > > sm
    > >
    > > Hi, Sylvia:
    > > >
    > > > I will need also to do similar average of the daily NCEP reanalysis
    > > > GRIB files. Is there any similar Unix commands available to do
    > > > the average?
    > > >
    > > > Thank again!
    > > >
    > > > hui
    >
    >
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    >

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