例7.2.2和例7.2.3.sas

SAS 源码 《应用多元分析》王学民编著的SAS程序

data examp722(type=cov);
  input _name_$  x1-x3;
  cards;
x1     16    .      .
x2      2    1      .
x3     30    4    100
;
proc princomp cov;
   var x1-x3;
proc princomp;
   var x1-x3;
run;