getList: List and Data.frame Representation for Recommender Matrix...

In mhahsler/recommenderlab: Lab for Developing and Testing Recommender Algorithms

List and Data.frame Representation for Recommender Matrix Objects

Description

Create a list or data.frame representation for various objects used in recommenderlab. These functions are used in addition to available coercion to allow for parameters like decode.

Usage

getList(from, ...)
## S4 method for signature 'realRatingMatrix'
getList(from, decode = TRUE, ratings = TRUE, ...)
## S4 method for signature 'binaryRatingMatrix'
getList(from, decode = TRUE, ...)
## S4 method for signature 'topNList'
getList(from, decode = TRUE, ...)

getData.frame(from, ...)
## S4 method for signature 'ratingMatrix'
getData.frame(from, decode = TRUE, ratings = TRUE, ...)

Arguments

from	object to be represented as a list.
decode	use item names or item IDs (column numbers) for items?
ratings	include ratings in the list or data.frame?
...	further arguments (currently unused).

Details

Lists have one vector with items (and ratings) per user. The data.frame has one row per rating with the user in the first column, the item as the second and the rating as the third.

Value

Returns a list or a data.frame.

See Also

binaryRatingMatrix, realRatingMatrix, topNList.

Examples

data(Jester5k)

getList(Jester5k[1,])
getData.frame(Jester5k[1,])

mhahsler/recommenderlab documentation built on March 19, 2024, 5:48 p.m.