HDF filepath is the name of the directory containing the HDF file.
HDF filename is the filename of the HDF file excluding the path.
SDDSfile is the SDDS output that is created.
switches:
{-arraysPreferred | -columnsPreferred} -- Requests that the output be in the form of an SDDS array or SDDS columns. By default, -columnsPreferred is used.
{-binary | -ascii} -- Requests that the output be binary or ASCII.
-withIndex -- An index column is added to the output file.