在r中尝试执行knn函数时遇到问题

我试图使用knn函数，但每次尝试调用该函数时，我都会收到以下错误消息：

Error in knn(train = dataTrain, test = dataTest, cl = dataLabelsTrain,  :
    NA/NaN/Inf in foreign function call (arg 6)

knn(train = dataTrain, test = dataTest,cl=dataLabelsTrain, k=3)

我将在这里留下我使用的变量

trainId

trainId <- sample(1:num.samples, size = 0.75 * num.samples)

此外，这也是我尝试执行函数的方式：

Error in knn(train = dataTrain, test = dataTest, cl = dataLabelsTrain,  :
    NA/NaN/Inf in foreign function call (arg 6)

knn(train = dataTrain, test = dataTest,cl=dataLabelsTrain, k=3)

knn(train = dataTrain, test = dataTest,cl=dataLabelsTrain, k=3)