在SAS中，如何比较用'/'分隔的一个字符串中的字符

Question

I'm new to SAS. Here is my problem. Suppose I have the following dataset named data :

id string 1 Comm Bank/Comm Bank 2 Comm Bank/Cash Flow 3 Financial Statement/Financial Statement/Financial Statement 4 Comm Bank/Wealth Management/Real Estate 5 Comm Bank/Cash Flow/Comm Bank

And I wish to create a flag followed by the rules: If all characters separated by / are the same, then flag = 0 otherwise flag = 1. For example, the obs 1 has characters Comm Bank and Comm Bank and they are the same, then flag = 0 . But for the obs 5, since there is a different Cash Flow , so the flag = 1 .

Thank you very much!

Answer 1

You should just be able to compare the first word to each of the others. You can stop when you find that one does not match.

data want;
  set have ;
  flag=0
  word1 = scan(string,1,'/');
  do i=2 to countw(string,'/') while (flag=0);
    if word1 ne scan(string,i,'/') then flag=1;
  end;
run;