[求助]谁能给讲讲RXPARSE 函数以及其中$-的意义HE

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关键词：RXPARSE ARS 求助 函数 RXPARSE

The RX set of functions and CALL routines have been removed from the documentation. They have been replaced by a set of PRX functions and CALL routines, which have been available in previous versions of SAS, and which provide superior functionality.

The following table lists the RX functions and CALL routines and their PRX replacements:

RX Function PRX Replacement
CALL RXCHANGE CALL PRXCHANGE
CALL RXFREE CALL PRXFREE
CALL RXSUBSTR CALL PRXSUBSTR
RXMATCH PRXMATCH
RXPARSE PRXPARSE


Examples


The following example uses metacharacters and regular characters to construct a Perl regular expression. The example parses addresses and writes formatted results to the SAS log.

data _null_;
   if _N_ = 1 then
   do;
      retain patternID;

         /* The i option specifies a case insensitive search. */
      pattern = "/ave|avenue|dr|drive|rd|road/i";
      patternID = prxparse(pattern);
   end;

   input street $80.;
   call prxsubstr(patternID, street, position, length);
   if position ^= 0 then
   do;
      match = substr(street, position, length);
      put match:$QUOTE. "found in " street:$QUOTE.;
   end;
   datalines;
153 First Street
6789 64th Ave
4 Moritz Road
7493 Wilkes Place
;

The following lines are written to the SAS log:

   "Ave" found in "6789 64th Ave"
   "Road" found in "4 Moritz Road"