internalFunctions {recommenderlab}

Internal Utility Functions

Description

Utility functions used internally by recommender algorithms. See files starting with RECOM in the package's R directory for examples of usage.

Usage

returnRatings(ratings, newdata,
  type = c("topNList", "ratings", "ratingMatrix"),
  n, randomize = NULL, minRating = NA)

getParameters(defaults, parameter)

Arguments

ratings

a realRatingMatrix.

newdata

a realRatingMatrix.

type

type of recommendation to return.

n

max. number of entries in the top-N list.

randomize

randomization factor for producing the top-N list.

minRating

do not include ratings less than this.

defaults

list with parameters and default values.

parameter

list with actual parameters.

Details

returnRatings is used in the predict function of recommender algorithms to return different types of recommendations.

getParameters is a helper function which checks parameters for consistency and provides default values. Used in the Recommender constructor.