proc nlmixed data=clmfreq;
parms b0=0 b1=0 b2=0 b3=0;
linp=b0+b1*x1+ b2*x2+b3*x3;
mu=exp(linp);
model count~Poisson(mu);
predict pdf('Poisson',count,mu) out=poiOut(keep= count pred);
run;
请问poiout数据集的pred是计数的预测值吗?
我将 poiout输出,然后代入估计的参数,发现估计值不是pred?这是为什么呢?