reg6_5.sas

黄燕 吴平《SAS统计分析及应用》 书中一些例子的SAS程序代码

data data_prg.reg6_5a;
set data_prg.reg6_5;
x11=x1*x1 ; 
x22=x2*x2; 
x33=x3*x3; 
run;
proc reg data=data_prg.reg6_5a;           /*第1个REG过程用多种方法筛选变量 */
model y=x1-x3   / selection=backward;
model y=x1-x3   / selection=stepwise ;
model y=x1-x3   / selection=stepwise noint;
model y=x1-x3 x11 x22 x33   / selection=backward noint;
model y=x1-x3 x11 x22 x33   / selection=stepwise noint;
model y=x1-x3 x11 x22 x33   / selection=maxr start=1 stop=5 noint;
model y=x1-x3 x11 x22 x33   /selection=minr start=1 stop=5 noint;
run;
proc reg data=data_prg.reg6_5a;  
/*第2个REG过程，对确定的变量进行模型拟合并进行预测、共线性检验 */
model y=x1 x2 x11 x22  /noint selection=stepwise p r cli influence  
collin collinoint;
model y=x2 x11 x22  /noint p r cli influence  collin collinoint;
output out=data_prg.reg6_5d predicted=pdc;
run;
proc print data=data_prg.reg6_5d (drop=x11 x22 x33 x55);
run;