

 

Hi Uwe,
Thank you for your email. 
I need to compute one value indicating to the performance of knn but I don’t know anything other than MSE. Can you please tell me how I do that?
 
Many thanks,
Nancy
 

> Date: Mon, 22 Feb 2010 17:19:48 +0100
> From: ligges@statistik.tu-dortmund.de
> To: nancyadam84@hotmail.com
> CC: r-help@r-project.org
> Subject: Re: [R] Error with KNN
> 
> 
> 
> On 20.02.2010 19:10, Nancy Adam wrote:
> >
> >
> >
> > Hi all
> >
> > I receive this error message: “Error in mymodel$MSE : $ operator is invalid for atomic vectors”
> > When I use KNN.
> > This is the code:
> >
> > library(e1071)
> > train<- rbind(iris3[,,1], iris3[,,2], iris3[,,3])
> > cl<- factor(c(rep("s",50), rep("c",50), rep("v",50)))
> > knn.cv(train, cl, k = 3, prob = TRUE)
> > sqrt(mymodel$MSE)
> > #error message : “Error in mymodel$MSE : $ operator is invalid for atomic vectors”
> >
> 
> There is no component MSE in mymodel. Hence you cannot extract it.
> 
> Uwe Ligges
> 
> 
> 
> 
> 
> > thanks,
> > Nancy
> > 
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