dblfarr(file, dimensions [, offset=offset,
double array dimensional structure with the specified
dimensions to the specified
dimensions may be an array, or up to
arguments containing one dimension each. No file checks are made.
offset indicates the length in bytes of a header after
which the array data is to be found. It defaults to zero. Keyword
/readonly disallows writing into the file through the file
/swap indicates that the data should be
byte-swapped after reading (for input only).
See also: array, File Arrays, #max_dims