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Contents
#!/usr/bin/env ruby
##############################################################
=begin
= NAME
grads2nc_with_gphys - GrADS to NetCDF converter
= WARNING
Not efficient if the GrADS file has many variables.
= USAGE
% grads2nc_with_gphys infilename outfilename [-v varname1 [varname2 ...]]
= EXAMPLE
% grads2nc_with_gphys ../testdata/T.jan.ctl tmp.nc
% grads2nc_with_gphys ../testdata/T.jan.ctl tmp.nc -v T
=end
##############################################################
usage = "\n\n"+<<EOS
#{$0}: GrADS to NetCDF converter.
USAGE:
% #{$0} infilename outfilename [-v varname1 [varname2 ...]]
Here, the -v option is used to limit variables to copy
(all variables are copied by default). Note that to copy many
variables may not be effifient.
EOS
# < interpret command-line arguments >
varnames = nil
if ARGV[2] == '-v'
varnames = []
(ARGV.length-3).times{ varnames.unshift( ARGV.pop ) }
ARGV.pop
end
if ARGV.length != 2
raise usage
else
infilename, outfilename = ARGV[0..1]
end
# < convert >
require "numru/gphys"
include NumRu
grfile = GrADS_Gridded.open(infilename)
varnames = grfile.varnames if !varnames
out_file = NetCDF.create(outfilename)
varnames.each do |varname|
temp = GPhys::GrADS_IO.open(grfile,varname)
GPhys::NetCDF_IO.write(out_file,temp)
end
out_file.close
Version data entries
17 entries across 17 versions & 2 rubygems