[求助] sas 中 input @与@@ 的区别是什么

貌似双@符号的是强制换行，只要读够列数

受教，O(∩_∩)O谢谢

Sometimes you need to move the pointer explicitly, and you can do that by using the column
pointer, @n, where n is the number of the column SAS should move to.

In the preceding program (INPUT ParkName $ 1-22 State $ Year @40 Acreage COMMA9.;), the column pointer @40 tells SAS to move to column 40 before reading
the value for Acreage.