*求助*，怎么样把*第四个观测的第二个号码串输出来*/

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data a;/*求助*，怎么样把*第四个观测的第二个号码串输出来*/
input string $ 50.;
cards;
THIS LINE DOES NOT HAVE ANY PHONE NUMBERS ON IT
THIS LINE DOES: (123)345-4567 LA DI LA DI LA
ALSO VALID (123) 999-9999
TWO NUMBERS HERE (333)444-5555 AND (800)123-4567
;
run;

data b;
set a;
per=prxparse("/\(\d{3}\) ?\d{3}-\d{4}/");
retain per;
if prxmatch(per,string) then do;
call prxsubstr(per,string,start,length);
b=substr(string,start,length);
b=compress(b," ");
output;
end;
run;

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关键词：怎么样 PrxMatch compress Numbers RXPARSE

试试call prxnext：

data b;
set a;
if _n_=1 then
per=prxparse("/(\(\d{3}\) ?\d{3}-\d{4})/");
retain per;
    start = 1;
   stop = length(string);
   call prxnext(per, start, stop, string, position, length);
      do until (position = 0);
         found = substr(string, position, length);
                 output;
         call prxnext(per, start, stop, string, position, length);
      end;
run;