在RStudio上使用 recommenderlab 包。从.csv文件中读取表并命名为data.frame Sweets。使用Recommender命令时出错：
Sweets <- read.table(file.choose(), header = FALSE,sep=",", nrows = 17903)
> recommenderRegistry$get_entries(dataType = "realRatingMatrix")
$IBCF_realRatingMatrix
Recommender method: IBCF
Description: Recommender based on item-based collaborative filtering (real data).
> Recommender(Sweets[1:17903], method="IBCF")
Error in Recommender(Sweets[1:17903], method = "IBCF") :
error in evaluating the argument 'data' in selecting a method for function 'Recommender':
Error in `[.data.frame`(Sweets, 1:17903) : undefined columns selected
关于数据：
ncol(Sweets)
[1] 3
nrow(Sweets)
[1] 17903
str(Sweets)
'data.frame': 17903 obs. of 3 variables:
$ V1: int 351 57 385 286 126 371 131 116 364 180 ...
$ V2: int 31 9 30 23 16 46 20 17 18 40 ...
$ V3: int 0 3 1 4 3 0 5 3 3 2 ...
head(Sweets)[, 1:3]
V1 V2 V3
1 351 31 0
2 57 9 3
3 385 30 1
4 286 23 4
5 126 16 3
6 371 46 0
如果我能提供更多信息，请告诉我。