Function: GDSC_SUBSTRUCT Purpose: return subset delimited by two coordinate words Category: GDS File: gdsc_substruct.c Author: W. Zwitser Use: INTEGER GDSC_SUBSTRUCT( SET, Input character CLOW, Input integer CUPP, Input integer ERROR ) In/Out integer GDSC_SUBSTRUCT level of CLOW and CUPP SET set name CLOW lower left coordinate word CUPP upper right coordinate word ERROR 0 = successful <0 = a GDS error Updates: Dec 5, 1989: WZ, migrated to C Oct 31, 1990: WZ, 'naxis', etc. from setsta -> dsc_file Mar 24, 1994: JPT, modified to cooperate with GDS server.