proc format;
value a 0.9='从不逃课' 2.1='偶尔逃课' 3='经常逃课';
value b 1='grade2004' 2='grade2005';
run;
data chapter2.exercise7;
format project a.;
input project$@@;
cards;
1 1 1 1 1 1 1 1
2 2 2 2 2 2 2 2 2 2
2 2 2 2 2 2 2 2 2 2
2 2 2 2 2 2 2 2 2 2
2 2 2 2 2 2 2 2 2 2
2 2 2 2 2 2 2 2 2 2
2 2 2 2 2 2 2 2 2 2
2 2 2 2 2 2
3 3 3 3 3 3 3 3 3 3
3 3 3 3 3 3 3 3 3 3
3 3 3 3 3 3
;
run;
proc gchart data=chapter2.exercise7;
pie project/type=percent;
run;



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