R help - Nov 2014 - how to use the rpart model to predict new data frame?

Dear expeRts,
? ? Now i have a ?train ?dataset a ?and ?test dataset b , i ?using the following
codes:
rp<-rpart(y~.,data=a,method="class")
plot(rp)
text(rp)
but how can i use the trained model to predict b?
TKS.






--

PO SU
mail: desolator88 at 163.com 
Majored in Statistics from SJTU

HI,

Try this:

results <- predict(rp,b,type = "vector")

Regards,
Bharat


On 12 November 2014 09:17, PO SU <rhelpmaillist at 163.com> wrote:
>
> Dear expeRts,
>     Now i have a  train  dataset a  and  test dataset b , i  using the
> following codes:
> rp<-rpart(y~.,data=a,method="class")
> plot(rp)
> text(rp)
> but how can i use the trained model to predict b?
> TKS.
>
>
>
>
>
>
> --
>
> PO SU
> mail: desolator88 at 163.com
> Majored in Statistics from SJTU
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
	[[alternative HTML version deleted]]

> On Nov 11, 2014, at 7:47 PM, PO SU <rhelpmaillist at 163.com> wrote:
> 
> 
> Dear expeRts,
>     Now i have a  train  dataset a  and  test dataset b , i  using the
following codes:
> rp<-rpart(y~.,data=a,method="class")
> plot(rp)
> text(rp)
> but how can i use the trained model to predict b?
?predict
> --
> 
> PO SU
> mail: desolator88 at 163.com 
> Majored in Statistics from SJTU
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
David Winsemius, MD
Alameda, CA, USA