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Question about using an array as an index [message #6487] Wed, 26 June 1996 00:00
David Schwab is currently offline  David Schwab
Messages: 2
Registered: June 1996
Junior Member
Can anyone explain why these two codes produce different results?

IDL> a=[0,1,1,2,2,2]
IDL> b=intarr(3)
IDL> b(a)=b(a)+1
IDL> print,b
1 1 1
and

IDL> a=[0,1,1,2,2,2]
IDL> b=intarr(3)
IDL> for i=0,5 do b(a(i))=b(a(i))+1
IDL> print,b
1 2 3

Thanks!
--
Dr. David J. Schwab
NOAA Great Lakes Environmental Research Laboratory
2205 Commonwealth Blvd.
Ann Arbor, MI 48105
313-741-2120
313-741-2055 (FAX)

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