导入新变量t的代码:
data boject;
set object;
t=2-disease;
run;
运行下面这个的时候报错:
proc phreg data=object;
model t*disease(0)=x1-x5
/selection=stepwise
sle=0.1 sls=0.15
ties=discrete;
strata subclass;
run;
报错显示为:t没有找到