module NumRu::GPhys::GrADS_IO

helps read/write GrADS-formatted data

Module functions

is_a_GrADS?(filename)

test whether the file is a GrADS control file.

ARGUMENTS

• filename (String): filename to test.

RETURN VALUE

• true/false

open(file, varname)

GPhys constructor from GrADS.

ARGUMENTS

• file (GrADS_Gridded or String): file to read. If string, it must be the name (path) of a GrADS control 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 T.jan.ctl 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::GrADS_IO.open("T.jan.ctl","T")

write(file, gphys, name=nil)

writes a GPhys object into a GrADS file. -- !!only 4D data is supported!!

var_names(file)

ARGUMENTS

• file (GrADS_Gridded or String): if string, it must be the name (path) of a GrADS control 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