rrecsys

Environment for Evaluating Recommender Systems

v0.9.7.3.1 · Jun 9, 2019 · GPL-3

Description

Processes standard recommendation datasets (e.g., a user-item rating matrix) as input and generates rating predictions and lists of recommended items. Standard algorithm implementations which are included in this package are the following: Global/Item/User-Average baselines, Weighted Slope One, Item-Based KNN, User-Based KNN, FunkSVD, BPR and weighted ALS. They can be assessed according to the standard offline evaluation methodology (Shani, et al. (2011) <doi:10.1007/978-0-387-85820-3_8>) for recommender systems using measures such as MAE, RMSE, Precision, Recall, F1, AUC, NDCG, RankScore and coverage measures. The package (Coba, et al.(2017) <doi: 10.1007/978-3-319-60042-0_36>) is intended for rapid prototyping of recommendation algorithms and education purposes.

Downloads

300

Last 30 days

10329th

300

Last 90 days

300

Last year

CRAN Check Status

14 NOTE

Show all 14 flavors

Flavor	Status	Time
r-devel-linux-x86_64-debian-clang	NOTE	165.5s
r-devel-linux-x86_64-debian-gcc	NOTE	111s
r-devel-linux-x86_64-fedora-clang	NOTE	268.1s
r-devel-linux-x86_64-fedora-gcc	NOTE	290.2s
r-devel-macos-arm64	NOTE	34s
r-devel-windows-x86_64	NOTE	205s
r-oldrel-macos-arm64	NOTE
r-oldrel-macos-x86_64	NOTE	94s
r-oldrel-windows-x86_64	NOTE	238s
r-patched-linux-x86_64	NOTE	143.6s
r-release-linux-x86_64	NOTE	140.6s
r-release-macos-arm64	NOTE
r-release-macos-x86_64	NOTE	117s
r-release-windows-x86_64	NOTE	201s

Check details (16 non-OK)

NOTE r-devel-linux-x86_64-debian-clang

CRAN incoming feasibility

Maintainer: ‘Ludovik Çoba <Ludovik.Coba@inf.unibz.it>’

Found the following URLs which should use \doi (with the DOI name only):
  File ‘rrecsys.Rd’:
    http://dx.doi.org/10.1109/MC.2009.263

NOTE r-devel-linux-x86_64-debian-clang

Rd files

checkRd: (-1) rrecsys.Rd:72: Lost braces; missing escapes or markup?
    72 |  The average deviation rating $dev_{ij}$ between co-rated items is defined by:
       |                                    ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the same item and the number of observed ratings.
       |           ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the same item and the number of observed ratings.
       |                                                                              ^

NOTE r-devel-linux-x86_64-debian-gcc

CRAN incoming feasibility

Maintainer: ‘Ludovik Çoba <Ludovik.Coba@inf.unibz.it>’

Found the following URLs which should use \doi (with the DOI name only):
  File ‘rrecsys.Rd’:
    http://dx.doi.org/10.1109/MC.2009.263

NOTE r-devel-linux-x86_64-debian-gcc

Rd files

checkRd: (-1) rrecsys.Rd:72: Lost braces; missing escapes or markup?
    72 |  The average deviation rating $dev_{ij}$ between co-rated items is defined by:
       |                                    ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the same item and the number of observed ratings.
       |           ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the same item and the number of observed ratings.
       |                                                                              ^

NOTE r-devel-linux-x86_64-fedora-clang

Rd files

checkRd: (-1) rrecsys.Rd:72: Lost braces; missing escapes or markup?
    72 |  The average deviation rating $dev_{ij}$ between co-rated items is defined by:
       |                                    ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the same item and the number of observed ratings.
       |           ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the same item and the number of observed ratings.
       |                                                                              ^

NOTE r-devel-linux-x86_64-fedora-gcc

Rd files

checkRd: (-1) rrecsys.Rd:72: Lost braces; missing escapes or markup?
    72 |  The average deviation rating $dev_{ij}$ between co-rated items is defined by:
       |                                    ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the same item and the number of observed ratings.
       |           ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the same item and the number of observed ratings.
       |                                                                              ^

NOTE r-devel-macos-arm64

Rd files

checkRd: (-1) rrecsys.Rd:72: Lost braces; missing escapes or markup?
    72 |  The average deviation rating $dev_{ij}$ between co-rated items is defined by:
       |                                    ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the same item and the number of observed ratings.
       |           ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the same item and the number of observed ratings.
       |                                                                              ^

NOTE r-devel-windows-x86_64

Rd files

checkRd: (-1) rrecsys.Rd:72: Lost braces; missing escapes or markup?
    72 |  The average deviation rating $dev_{ij}$ between co-rated items is defined by:
       |                                    ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the same item and the number of observed ratings.
       |           ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the same item and the number of observed ratings.
       |                                                                              ^

NOTE r-oldrel-macos-arm64

Rd files

checkRd: (-1) rrecsys.Rd:72: Lost braces; missing escapes or markup?
    72 |  The average deviation rating $dev_{ij}$ between co-rated items is defined by:
       |                                    ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the same item and the number of observed ratings.
       |           ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the same item and the number of observed ratings.
       |                                                                              ^

NOTE r-oldrel-macos-x86_64

Rd files

checkRd: (-1) rrecsys.Rd:72: Lost braces; missing escapes or markup?
    72 |  The average deviation rating $dev_{ij}$ between co-rated items is defined by:
       |                                    ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the same item and the number of observed ratings.
       |           ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the same item and the number of observed ratings.
       |                                                                              ^

NOTE r-oldrel-windows-x86_64

Rd files

checkRd: (-1) rrecsys.Rd:72: Lost braces; missing escapes or markup?
    72 |  The average deviation rating $dev_{ij}$ between co-rated items is defined by:
       |                                    ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the same item and the number of observed ratings.
       |           ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the same item and the number of observed ratings.
       |                                                                              ^

NOTE r-patched-linux-x86_64

Rd files

checkRd: (-1) rrecsys.Rd:72: Lost braces; missing escapes or markup?
    72 |  The average deviation rating $dev_{ij}$ between co-rated items is defined by:
       |                                    ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the same item and the number of observed ratings.
       |           ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the same item and the number of observed ratings.
       |                                                                              ^

NOTE r-release-linux-x86_64

Rd files

checkRd: (-1) rrecsys.Rd:72: Lost braces; missing escapes or markup?
    72 |  The average deviation rating $dev_{ij}$ between co-rated items is defined by:
       |                                    ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the same item and the number of observed ratings.
       |           ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the same item and the number of observed ratings.
       |                                                                              ^

NOTE r-release-macos-arm64

Rd files

checkRd: (-1) rrecsys.Rd:72: Lost braces; missing escapes or markup?
    72 |  The average deviation rating $dev_{ij}$ between co-rated items is defined by:
       |                                    ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the same item and the number of observed ratings.
       |           ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the same item and the number of observed ratings.
       |                                                                              ^

NOTE r-release-macos-x86_64

Rd files

checkRd: (-1) rrecsys.Rd:72: Lost braces; missing escapes or markup?
    72 |  The average deviation rating $dev_{ij}$ between co-rated items is defined by:
       |                                    ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the same item and the number of observed ratings.
       |           ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the same item and the number of observed ratings.
       |                                                                              ^

NOTE r-release-windows-x86_64

Rd files

checkRd: (-1) rrecsys.Rd:72: Lost braces; missing escapes or markup?
    72 |  The average deviation rating $dev_{ij}$ between co-rated items is defined by:
       |                                    ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the same item and the number of observed ratings.
       |           ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the same item and the number of observed ratings.
       |                                                                              ^

Check History

NOTE 0 OK · 14 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE Mar 9, 2026

NOTE r-devel-linux-x86_64-debian-clang

CRAN incoming feasibility

Maintainer: ‘Ludovik Çoba <Ludovik.Coba@inf.unibz.it>’

Found the following URLs which should use \doi (with the DOI name only):
  File ‘rrecsys.Rd’:
    http://dx.doi.org/10.1109/MC.2009.263

NOTE r-devel-linux-x86_64-debian-gcc

CRAN incoming feasibility

Maintainer: ‘Ludovik Çoba <Ludovik.Coba@inf.unibz.it>’

Found the following URLs which should use \doi (with the DOI name only):
  File ‘rrecsys.Rd’:
    http://dx.doi.org/10.1109/MC.2009.263

NOTE r-devel-linux-x86_64-fedora-clang

Rd files

checkRd: (-1) rrecsys.Rd:72: Lost braces; missing escapes or markup?
    72 |  The average deviation rating $dev_{ij}$ between co-rated items is defined by:
       |                                    ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the sam

NOTE r-devel-linux-x86_64-fedora-gcc

Rd files

checkRd: (-1) rrecsys.Rd:72: Lost braces; missing escapes or markup?
    72 |  The average deviation rating $dev_{ij}$ between co-rated items is defined by:
       |                                    ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the sam

NOTE r-devel-macos-arm64

Rd files

checkRd: (-1) rrecsys.Rd:72: Lost braces; missing escapes or markup?
    72 |  The average deviation rating $dev_{ij}$ between co-rated items is defined by:
       |                                    ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the sam

NOTE r-devel-windows-x86_64

Rd files

checkRd: (-1) rrecsys.Rd:72: Lost braces; missing escapes or markup?
    72 |  The average deviation rating $dev_{ij}$ between co-rated items is defined by:
       |                                    ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the sam

NOTE r-patched-linux-x86_64

Rd files

checkRd: (-1) rrecsys.Rd:72: Lost braces; missing escapes or markup?
    72 |  The average deviation rating $dev_{ij}$ between co-rated items is defined by:
       |                                    ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the sam

NOTE r-release-linux-x86_64

Rd files

checkRd: (-1) rrecsys.Rd:72: Lost braces; missing escapes or markup?
    72 |  The average deviation rating $dev_{ij}$ between co-rated items is defined by:
       |                                    ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the sam

NOTE r-release-macos-arm64

Rd files

checkRd: (-1) rrecsys.Rd:72: Lost braces; missing escapes or markup?
    72 |  The average deviation rating $dev_{ij}$ between co-rated items is defined by:
       |                                    ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the sam

NOTE r-release-macos-x86_64

Rd files

checkRd: (-1) rrecsys.Rd:72: Lost braces; missing escapes or markup?
    72 |  The average deviation rating $dev_{ij}$ between co-rated items is defined by:
       |                                    ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the sam

NOTE r-release-windows-x86_64

Rd files

checkRd: (-1) rrecsys.Rd:72: Lost braces; missing escapes or markup?
    72 |  The average deviation rating $dev_{ij}$ between co-rated items is defined by:
       |                                    ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the sam

NOTE r-oldrel-macos-arm64

Rd files

checkRd: (-1) rrecsys.Rd:72: Lost braces; missing escapes or markup?
    72 |  The average deviation rating $dev_{ij}$ between co-rated items is defined by:
       |                                    ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the sam

NOTE r-oldrel-macos-x86_64

Rd files

checkRd: (-1) rrecsys.Rd:72: Lost braces; missing escapes or markup?
    72 |  The average deviation rating $dev_{ij}$ between co-rated items is defined by:
       |                                    ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the sam

NOTE r-oldrel-windows-x86_64

Rd files

checkRd: (-1) rrecsys.Rd:72: Lost braces; missing escapes or markup?
    72 |  The average deviation rating $dev_{ij}$ between co-rated items is defined by:
       |                                    ^
checkRd: (-1) rrecsys.Rd:76: Lost braces; missing escapes or markup?
    76 |  Where $c_{ij}$ is the number of co-ratings between items $i$ and $j$ and $r_{ui}$ is an existing rating for user $u$ on item $i$. The Weighted Slope One takes into account both, information from users who rated the sam

Dependency Network

Version History

new 0.9.7.3.1 Mar 10, 2026

Maintainer

Ludovik Çoba

Dependencies

Depends

R (>= 3.1.2) registry MASS stats knitr ggplot2

Imports

methods Rcpp

Compilation

Needs compilation

First Published

Mar 10, 2026

RSS Feed

CRAN Checks

View on CRAN →