Function: DBLANK Purpose: Logical function returning whether argument is a universal BLANK (undefined). Category: DATA File: floating.c Author: K.G. Begeman Use: LOGICAL DBLANK( DATA ) Input DOUBLE PRECISION DATA Data value to check upon. Notes: - Each application routine which reads in data must check before doing its operation whether a datum has the blank value. - It is faster to do a direct compare in your application routine. The universal BLANK can be obtained with subroutine SETDBLANK. Example: DOUBLE PRECISION BLANK CALL SETDBLANK( BLANK ) FOR I = 1, N IF (BLANK .EQ. DATA(I)) THEN CALL SETDBLANK(RESULT(I)) ELSE RESULT(I) = 2.0D0 * DATA(I) + 3.1456D0 CIF CFOR Warning: This routine is system dependent! Updates: May 18, 1988: KGB, Document created.