R Error Recommender method UCBF not implemented for data type realRatingMatrix

Question

Error: Recommender method UCBF not implemented for data type realRatingMatrix.

Code - 

train = sample(x = c(TRUE, FALSE), size = nrow(Jester5k),replace = TRUE, prob = c(0.8, 0.2))
dataset_train = Jester5k[train,]
dataset_test = Jester5k[!train,]

rec_model = Recommender(data=dataset_train,method="UCBF")

Can someone help me with this error.

Comments

old question, but for anyone seeing this Kaylan has a typo: should be "UBCF".

I arrived here because I was calling:

   Recommender(realRat, "UBCF_realRatingMatrix")

because  

   recommenderRegistry$get_entries(dataType="realRatingMatrix")

return this (amongst other things):

   $UBCF_realRatingMatrix
   Recommender method: UBCF for realRatingMatrix
   Description: Recommender based on user-based collaborative filtering.
   Reference: NA
   Parameters:
       method nn sample weighted normalize min_matching_items min_predictive_items
   1 "cosine" 25  FALSE     TRUE  "center"                  0                    0

Answer 1

Kalyan,

Try changing method from UBCF to POPULAR.

train = sample(x = c(TRUE, FALSE), size = nrow(Jester5k),replace = TRUE, prob = c(0.8, 0.2))
dataset_train = Jester5k[train,]
dataset_test = Jester5k[!train,]

rec_model = Recommender(data=dataset_train,method="POPULAR")