Hello.
I found the behavior of knn(
http://stat.ethz.ch/R-manual/R-devel/library/class/html/knn.html) function
looking very strange.
Consider the toy example.
> library(class)
> train <- matrix(nrow=5000,ncol=2,data=rnorm(10000,0,1))
> test <- matrix(nrow=10,ncol=2,data=rnorm(20,0,1))
> cl <- rep(c(0,1),2500)
> knn(train,test,cl,1)
[1] 1 1 0 0 1 0 1 1 0 1
Levels: 0 1
It works properly if you pass any number of nearest neibhours (4-th
parameter) from 1 to 499
But if you run it with number of n.n. >= 500 than there would be an error.
> knn(train,test,cl,500)
error in knn(train, test, cl, 500) : too many ties in knn
no matter what data you have. even if you run it with odd number of n.n.,
say, 501 (so there just can't be any ties) there will be exactly
the same error.
Am I missing smth?
[[alternative HTML version deleted]]
______________________________________________
R-help@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.
