谢谢啦
DATA A;
INPUT SALES ADV @@;
ADVLAG1=LAG1(ADV);
ADVLAG2=LAG2(ADV);
OUTPUT ;
CARDS;
2945 280 4295 400 5645 450 6995 590 8345 650
9695 750 11045 890 12395 1000 13745 1050 15095 1200
16445 1250 17795 1350 19145 1460 20495 1500 21845 1650
;
run;
PROC REG DATA=A;
MODEL SALES=ADV ADVLAG1 ADVLAG2;
RUN;



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