07-07-2014 08:27 AM
If you are trying to make some EDIT DISTANCE for two string, then PG 's suggest is good, SAS has already built-in some function for that purpose.
Otherwise , try
data have; input obs var1 $ var2 $; datalines; 1 RAT CAT 2 BELL BALL 3 TIME TOM ; run; data want(drop=n i); set have; n=0; do i=1 to length(var1); if char(var1,i) ne char(var2,i) then n+1; end; dif=divide(n,length(var1)); run;
07-08-2014 11:51 PM
How will I use the same logic for two different string, where words (unlike character here) have pattern:
Here is an example:
String 1: "It is a cat"
String 2: "This is a cat"
Can I use SAS to calculate that "String2 is 25% different from String1"?
07-09-2014 08:34 AM
OK. No problem.
data have; input obs var1 & $40. var2 & $40.; datalines; 1 It is a cat This is a cat 2 a fox jump over a dog Tom cat jump over a dog ; run; data want(drop=n i); set have; n=0; do i=1 to countw(var1); if upcase(scan(var1,i)) ne upcase(scan(var2,i)) then n+1; end; dif=divide(n,countw(var1)); run;