... <看更多>

So if you can really tell which type of id is in the variable ID by the length of the value then use that to decide whether or not you need ... ... <看更多>

首先不知道上面程式中的10950201是真的要那一年還是不小心打錯？ 另外tt=那一個公式裡面的最後一個substr(1,4)是不是也是typo？應該是substr(x,1,4) ... ... <看更多>

fbb="foo bar baz";. sbs=substr(fbb, 5, 3);. put sbs ... ... <看更多>

SAS extracts a substring from a string based on its position with the SUBSTR function. data _null_; set tips; put(substr(sex,1,1)); run;. ... <看更多>