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Date:         Fri, 22 Aug 2003 09:43:13 -0500
Reply-To:     Sterling Price <Sterling.Price@WAL-MART.COM>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Sterling Price <Sterling.Price@WAL-MART.COM>
Subject:      Re: Tiny Roundoff Errors in 8.2 for Windows
Content-Type: text/plain; charset="iso-8859-1"

I don't think this is the problem you're having, but it's worth noting that the rounding algorithm used in the ROUND function changed in 8.2. We noticed some rounding differences when upgrading to 8.2 from 6.09e on MVS -- here's the response I got from SI tech support when I asked about it:

the ROUND function was changed beginning in Release 8.2 (and with the hot fix that can be applied to Release 8.1). Prior to this change, the ROUND function could only accept round off units that were even multiples of 10. The ROUND function was rewritten to accept round off units that are not even multiples of 10 as well as performing fuzzing differently. We are now giving results resembling those from a calculator versus the true binary mathematical result. Release 8.1 and lower fuzzed the result if it was within a few bits of the first argument. The new version fuzzes the result if it is within a few bits of a multiple of .0001.


Sterling Price

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