Algorithme K.means

Bonjour ;
quelqu'un peut m'aider à corriger cette erreur:

Code:

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require(class)
require(stats)
library(RWeka)
require(stringer)
 
cancer <- read.csv("C:/Users/Jihen/Desktop/breast-cancer.data", header=FALSE)
View(cancer)
 
names(cancer) <- c('Class','age',' menopause','tumor-size','inv-nodes','node-caps','deg-malig','breast','breast-quad','breast-quad')
head(cancer)
cancer
cancer.features =cancer
cancer.features$Class<-NULL
View(cancer.features)
result <-kmeans(cancer.features,2)
result

et l'erreur

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Error in do_one(nmeth) : NA/NaN/Inf in foreign function call (arg 1)
In addition: Warning message:
In kmeans(cancer.features, 2) : NAs introduced by coercion

et merci