module NumRu::GPhys::Grib_IO

helps read Grib-formatted data

Module functions

is_a_Grib? filename)

test whether the file is a Grib file.

ARGUMENTS

• filename (String): filename to test.

RETURN VALUE

• true/false

open(file, varname)

GPhys constructor from Grib.

ARGUMENTS

• file (Grib or String): file to read. If string, it must be the name (path) of a Grib file.
• varname (String): name of the varible in the file, for which a GPhys object is constructed.

RETURN VALUE

• a GPhys

EXAMPLE

• Suppose that you have a file temp in the currentdirectly, and it contains a variable "T". The following creates a GPhys object representing the variable in the file.

  require "numru/gphys"
  include GPhys
  temp = GPhys::Grib_IO.open("temp","T")

write(file, gphys, name_dummy=nil)

Write a GPhys into a Grib file. The whole data under the GPhys (such as coordinate vars) are written self-descriptively.

ARGUMENTS

• file (Grib): the Grib file to write in. Must be writable of course.
• gphys (GPhys): the GPhys to write.
• name_dummy (nil) : Unused in this module; Just for consistency with others.

RETURN VALUE

• nil

var_names(file)

ARGUMENTS

• file (Grib or String): if string, it must be the name (path) of a Grib file.

RETURN VALUE

• names of variables (Array): this return the names of variables which the file has.

var_names_except_coordinates(file)

• same as var_names