【CountW函数】系列2：delimiter n 和d

求问为什么结果不是:  obs    n    d
  1      3    4
  2      1    5

1. data test;
   
2.         input string $char60.;
   
3.         datalines;
   
4. '_'2+2=4
   
5. \\"Windows"  "\Path\Names\Use\Backslashes
   
6. ;
   
7. run;
   
8. data test1;
   
9.     set test;
   
10.         d=countw(string,,'d');
    
11.         n=countw(string,,'n');
    
12. run;
    
13. proc print data=test1;run;

复制代码

Remember that character variables are padded with trailing blanks. When you specify the delimiters and do not include a blank as a delimiter, the trailing blanks counts as a word.  You can use the TRIMN function to remove trailing blanks.
string='_'2+2=4 d=3 n=4
string=\\"Windows"  "\Path\Names\Use\Backslashes d=1 n=5

1. data test1;
   
2. set test;
   
3. d=countw(trimn(string),,'d');
   
4. n=countw(trimn(string),,'n');
   
5. 
   
6. put (string d n)(=) ;
   
7. run;

复制代码