[R] predict.lm with matrix as newdata

[Uwe Ligges]

Marlin Keith Cox wrote:
> Z is a matrix and when I run the following line, it creates a prediction
> estimate using each column, how can I get it an estimate for each individual
> number.  I have tried changing Z to a data.frame, but this does not do it
> either.
> 
> model.lm<-lm(w~x)
> 
> pred.est <- predict.lm(model.lm, data.frame(x=Z))

That's what I do and it always worked for me. Can you please specify a 
reproducible example that shows what you got and tells us exactly what 
you expected?

BTW: It is expected that you call the generic predict() rather than its 
particular method.

Uwe Ligges


> Thanks in advance,
> keith
>