SAS：如何按字母順序對變量中的單詞進行排序？

Question

我想有以下幾點：

 

    data animals; 
     length string_in $50; 
     infile datalines dlm=","; 
     input string_in; 
     datalines; 
    rattlesnake honeybadger 
    lion eagle shark gorilla 
    mouse ape horse 
    ; 
    run; 


     data animals_sorted; 
     set animals; 

     /* magic happens*/ 

     put string_in; 
     run; 


Output: 
    string_in: honeybadger rattlesnake 
    string_in: eagle gorilla lion shark 
    string_in: ape horse mouse 

你有什麼樣的魔力進入這裏？

Answer 1

我不知道任何SAS功能在串排序的話，但SAS可以在陣列中的變量值進行排序。

data animals; 
    length string_in $50; 
    infile datalines dlm=","; 
    input string_in; 
    datalines; 
rattlesnake honeybadger 
lion eagle shark gorilla 
mouse ape horse 
;;;; 
    run; 
data animals_sorted; 
    set animals; 
    array animals[10] $32 _temporary_; 
    call missing(of animals[*]); 
    do i = 1 to dim(animals) until(p eq 0); 
     call scan(string_in,i,p,l); 
     animals[i] = substrn(string_in,p,l); 
     end; 
    call sortc(of animals[*]); 
    length string_out $50; 
    string_out = catx(' ',of animals[*]); 
    drop i p l; 
    run; 
proc print; 
    run;