KNN in R: 'train and class have different lengths'?

Question

Here is my code:

train_points <- read.table(\"kaggle_train_points.txt\", sep=\"\\t\")
train_labels <- read.table(\"kaggle_train_labels.txt\", sep=\"\\t         


        

Answer 1

Simply set drop = TRUE while you're excluding cl from dataframe, it causes to remove dimension from an array which have only one level:

cl = train_labels[,1, drop = TRUE]
knn(train_points, test_points, cl, k = 5)