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Date:         Sun, 25 Jan 2009 19:20:21 +0000
Reply-To:     Paul Dorfman <sashole@BELLSOUTH.NET>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Paul Dorfman <sashole@BELLSOUTH.NET>
Organization: PDC
Subject:      Re: Regex - Seven of Nine Matching
Comments: To: Savian <>
In-Reply-To:  <>


But why... a Levenshtein implementation is already available via complev() function, and if that is not enough, there is always compged() augmented with call compcost() giving a much wider latitude in distance editing. Regardless, it appears that any of these are way too expensive for Don's purposes, forthey invariably have to examine all 9 characters, and then perform rather heavy computations. Comparing the corresponding digits and applying as much logical short-circuiting as much as possible (including that dictated by intimate data knowledge) is better equipped to deal with (unavoidable?) Cartesian product nature of the problem. I am using the question mark in the parentheses deliberately... for I have not fully proven to myself yet that no method to avoid comparing all to all exists.

Kind regards ------------ Paul Dorfman Jax, FL ------------

> I know you know C# a bit now so this algorithmic approach may help you > solve the issue. You could possibly code this in SAS or call it via C# > and include it into the dataset. > > Just some late night ideas... > > Alan

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