idlastro / Database Procedures: DB_OR

[Source code]

NAME
DB_OR
PURPOSE
Combine two vectors of entry numbers, removing duplicate values.
EXPLANATION
DB_OR can also be used to remove duplicate values from any longword 
vector
CALLING SEQUENCE
LIST = DB_OR( LIST1 )          ;Remove duplicate values from LIST1
        or
LIST = DB_OR( LIST1, LIST2 )   ;Concatenate LIST1 and LIST2, remove dups
INPUTS
LIST1, LIST2 - Vectors containing entry numbers, must be non-negative
                integers or longwords.
OUTPUT
LIST - Vector containing entry numbers in either LIST1 or LIST2
METHOD
DB_OR returns where the histogram of the entry vectors is non-zero
PROCEDURE CALLS
ZPARCHECK - checks parameters  
REVISION HISTORY
Written,     W. Landsman             February, 1989
Check for degenerate values  W.L.    February, 1993
Converted to IDL V5.0   W. Landsman   September 1997