hello ...
Can anyone help me with this :
In R.exe 2.6 , Unix , :-
plot.data<-model[[i]]$data$conc
newdata<-seq(min(plot.data),max(plot.data),by=1)
model.pred<-predict(model[[i]],data.frame(newdata),interval="prediction")
matpoints(newdata,model.pred[,c("Lower","Upper")],"l",col="blue",lty=1)
works OK ...
in Rgui 2.12 , Windows XP , same code
> plot.data<-model[[i]]$data$conc
> newdata<-seq(min(plot.data),max(plot.data),by=1)
>
model.pred<-predict(model[[i]],data.frame(newdata),interval="prediction")
Error in `[.data.frame`(newdata, , 2) : undefined columns selected
Robert Kinley ( 'baffled' of Berkshire )
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