[公告] SAS~~~~~~
data A;
input name$ chi eng;
cards;
a1 50 70
a2 30 60
a3 40 50
run;
proc sort data=A;
by name;
data B;
input name$ chi eng his bio;
cards;
a4 50 70 80 75
a6 30 60 70 66
a5 40 50 60 65
run;
proc sort data=B;
by name;
data C;
input name$ his bio;
cards;
a3 66 57
a2 55 78
a1 78 98
run;
proc sort data=C;
by name;
data D;
merge A C;
by name;
data E;
set D B;
ave=(chi+eng+his+bio)/4;
run;
proc means;
run;
proc print data=E;
run;
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