为何只读取了奇数行的观测呢？

shiyiming

这是我的代码，执行后发现只读取了1、3、5、7.....奇数行的观测，2、4、6...等偶数行的观测那里去了呢？请求高人指点！
data test;
    infile 'F:test.txt' expandtabs firstobs=3;
    input obs name:$ 13. var1-var56;       
run;

shiyiming

很奇怪的是，当我把v1-v29时，所有观测被全部读取；而当试到v1-v30时，就会只读取一半观测了！这是什么原因呢？

shiyiming

either you have a very special text file or today is your special day!

shiyiming

Obviously, the v30 is read from the even line. Because your odd line can only meet v1-v29. Your SAS dataset is hungry.