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Tips:Reg Exp Substitution in Proc Format
Did you know that PROC FORMAT in 9.3 allows regular expressions in INFORMAT and (user-written) function calls in FORMAT? Read Rick's SGF2012 paper and try to complete the chain reaction!
proc format; invalue $final 's/final/four/' (regexpe) = [$four.]; invalue $four 's/four/square/' (regexpe) = [$square.]; invalue $square 's/square/dance/' (regexpe) = [$dance.]; /* your code here */ invalue $travel 's/travel/guide/' (regexpe) = _same_; run; quit; data _null_; var = input("final", $final.); put var=; run; /* on log var=guide */