proc sql;
create table data_weibull_1 as
select *,1/rt as rt_1
from data_weibull;
quit;
proc nlin data=work.data_weibull_1;
parms a=0 b=0;
model rt_1=1-exp(-a*t**b);
run;
抱歉，不取倒数，nlin拟合报错，所以我取倒数了