%macro byyear(year=);
data interest;
set "C:\ResearchData\US_Interest_Data\interest.sas7bdat";
where year=&year.;
proc sort; by year month day;
proc expand data=interest out=interest method=step; var m1 m3 m6 m12;
请问大家 byyear(year=) 啥意思
proc expand 什么意思啊
