[R] R2

[Phil Spector]

Nancy -
    Please notice that ** is not an R operator. 
The caret (^) is the exponentiation operator in R.
                                       - Phil



On Tue, 29 Dec 2009, Nancy Adam wrote:

>
> Hi everyone,
> I tried to write the code of computing R2 for a regression system but I failed.
> This is the code I use for computing RMSE:
>
> my_svm_model <- function(myformula, mydata, mytestdata)
>      {
>      mymodel <- svm(myformula, data=mydata)
>      mytest <- predict(mymodel, mytestdata)
>      error <- mytest - mytestdata[,1]
>      -sqrt(mean(error**2))
>
>      }
> can anyone please tell me what I have to change to compute R2 instead of RMSE?
>
> Many thanks,
> Nancy
> _________________________________________________________________
>
>
> 	[[alternative HTML version deleted]]
>
> ______________________________________________
> 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.
>