If the argument string is longer than 80 bytes, the trailing bytes will be lost. If the argument is shorter, it will be padded with blanks. Note that the argument will already be processed by the GrADS expression parser, which will convert all characters to lower case and remove any blanks. Note that some of the values are essentially integer, but for convenience they are written as a floating point array. Appropriate care should be taken in the function program when converting these values back to integer.
Options are the same as for idim.
If both idim and jdim are -1, the grid is a single value. If 0, the dimension has non-linear scaling. If 0, the dimension has non-linear scaling. This is the world coordinate value of the first idim element, ONLY if idim has linear scaling and idim is not time. This is the increment of the world coordinate values for idim, ONLY if idim has linear scaling.