
 
 
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”
 
thanks,
Nancy
  		 	   		  
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