如果使用regular-expression-id,则需要先使用PRXPARSEfunction 指定一个 perl pattern。 举例: data _null_;patternID=prxparse('/world/');position=prxmatch(patternID,'Hello world!');run;/*或:*/data _null_;position=prxmatch('/world/','Hello world!');put position=;run; ...
You use an algorithm to analyze the training data to learn the function that maps the input to the output. This inferred function maps new, unknown examples by generalizing from the training data to anticipate results in unseen situations. Classification: When the data are being used to predict...
prxmatch() is the SAS function used to test if a regular expression matches with a string. A regular expression allows you to define a text pattern - and with prxmatch() you then test if a string matches this pattern. The syntax for Regular Expressions is in the beginning a bit hard to...
如果使用regular-expression-id ,则需要先使用 PRXPARSE function 指定一个 perl pattern。 举例: data _null_; patternID = prxparse('/world/'); position=prxmatch(patternID, 'Hello world!'); run; /*或:*/ data _null_; position=prxmatch('/world/', 'Hello ...
如果使用regular-expression-id,则需要先使用PRXPARSEfunction 指定一个 perl pattern。 举例: data _null_;patternID=prxparse('/world/');position=prxmatch(patternID,'Hello world!');run;/*或:*/data _null_;position=prxmatch('/world/','Hello world!');put position=;run; ...