yanan9256 发表于 2011-10-26 21:25 
注意 最后一个变量 可能由于位宽的问题 读错了 例如最后一个值 2010 都成10了
可以参考base 50题的第一题:An informat is used to translate the calendar date to a SAS date value. The date values are in the form of two-digit values for month-day-year, so the MMDDYY8. informat must be
used. When using an informat with list input, the colon-format modifier is required to correctly associate the informat with the variable name.