R语言编程有关缺失值

tongyao0811

在做函数处理前已经将缺失值用0来替换，为什么做了函数计算以后还会出现缺失值呢？怎么解决啊
>qm1.fit<-fitQmap(ob,md,method="PTF",transfun="expasympt",cost="RSS",wett.day=TRUE)
There were 50 or more warnings (use warnings() to see the first 50)
> warnings()
Warning messages:
1: In FUN(1:40545[[40545L]], ...) : model identification for  failed
NA's produced.
2: In FUN(1:40545[[40545L]], ...) : model identification for  failed
NA's produced.

``````
> qm1<-doQmap(mod,qm1.fit)
There were 50 or more warnings (use warnings() to see the first 50)> sum(is.na(qm1))
[1] 3093040



其中ob和md的缺失值都已经换成了0