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NCL NCL stands for NCAR Command Language . It is similar to IDL and MATLAB.

NCL NCL stands for NCAR Command Language . It is similar to IDL and MATLAB. It is most convenient for reading NetCDF files and plotting maps, but there are various routines for creating many other types of plots.

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NCL NCL stands for NCAR Command Language . It is similar to IDL and MATLAB.

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  1. NCL • NCL stands for NCAR Command Language. • It is similar to IDL and MATLAB. • It is most convenient for reading NetCDF files and plotting maps, but there are various routines for creating many other types of plots. • There are also many “built-in” functions to process data including many statistical routines. • More information at http://www.ncl.ucar.edu/

  2. $NCARG_NCARG = $NCARG_ROOT/lib/ncarg/ NetCDF (.nc, .cdf) HDF (.hdf) GRIB (.grib) var = new(dims, vartype)

  3. NCL variable metadata Variable: precipi Type: float Total Size: 18714240 bytes 4678560 values Number of Dimensions: 3 Dimensions and sizes: [TIME_EOSGRID | 24] x [YDim_EOSGRID | 361] x [XDim_EOSGRID | 540] Coordinates: TIME_EOSGRID: [ 0..1380] YDim_EOSGRID: [ -90.. 90] XDim_EOSGRID: [-180..179.3333333333333] Number Of Attributes: 12 _FillValue : 1e+15 long_name : Total surface precipitation flux standard_name : total_precipitation units : mm/hr scale_factor : 1 add_offset : 0 missing_value : 1e+15 fmissing_value : 1e+15 vmin : -1e+30 vmax : 1e+30 valid_range : ( -1e+30, 1e+30 ) hdf_name : PRECTOT precipi!1 = “YDim_EOSGRID” precipi&YDim_EOSGRID = lat precipi@units

  4. To run: ncl < program.ncl For more documentation, go to http://www.ncl.ncar.edu

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