r - R : 'train and class have different lengths' ? 中的 KNN

Question

这是我的代码:

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

#uses package 'class'
library(class)
knn(train_points, test_points, train_labels, k = 5);

dim(train_points)是 42000 x 784dim(train_labels)是 42000 x 1

我没有看到问题，但我收到错误:

Error in knn(train_points, test_points, train_labels, k = 5) :
'train' and 'class' have different lengths.

有什么问题？

Answer 1

无法访问数据，真的很难提供帮助。但是，我怀疑 train_labels应该是一个向量。所以试试

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

还要仔细检查:

dim(train_points)
dim(test_points)
length(cl)