xfc4.sas

those are some program of the sas system .and very useful when doing the statistic working .

title'双因素试验考虑交互作用';
data ex;do a=1 to 4;
do b=1 to 2;
do i=1 to 2;input x y @@;
output;end;end;end;
cards;
14.6 97.8 12.1 94.2 19.5 113.2 18.8 110.1
13.6 100.3 12.9 98.5 18.5 119.4 18.2 114.7
12.8 99.2 10.7 89.6 18.2 122.2 16.9 105.3
12 102.1 12.4 103.8 16.4 117.2 17.2 117.9
;
proc glm;class a b;model y=x a b a*b/solution;
lsmeans a b/stderr pdiff;run;