recommenderlab | Testing Recommender Algorithms - R package | Recommender System library

 by   mhahsler R Version: recommenderlab_1.0.2 License: No License

kandi X-RAY | recommenderlab Summary

kandi X-RAY | recommenderlab Summary

recommenderlab is a R library typically used in Artificial Intelligence, Recommender System applications. recommenderlab has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

This R package provides an infrastructure to test and develop recommender algorithms. The package supports rating (e.g., 1-5 stars) and unary (0-1) data sets. Supported algorithms are:. For evaluation, the framework supports given-n and all-but-x protocols with.
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              recommenderlab has a low active ecosystem.
              It has 205 star(s) with 58 fork(s). There are 15 watchers for this library.
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              It had no major release in the last 12 months.
              There are 7 open issues and 43 have been closed. On average issues are closed in 73 days. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of recommenderlab is recommenderlab_1.0.2

            kandi-Quality Quality

              recommenderlab has 0 bugs and 0 code smells.

            kandi-Security Security

              recommenderlab has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              recommenderlab code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              recommenderlab does not have a standard license declared.
              Check the repository for any license declaration and review the terms closely.
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              Without a license, all rights are reserved, and you cannot use the library in your applications.

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              recommenderlab releases are available to install and integrate.
              Installation instructions, examples and code snippets are available.
              It has 2638 lines of code, 0 functions and 102 files.
              It has low code complexity. Code complexity directly impacts maintainability of the code.

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            recommenderlab Key Features

            No Key Features are available at this moment for recommenderlab.

            recommenderlab Examples and Code Snippets

            No Code Snippets are available at this moment for recommenderlab.

            Community Discussions

            QUESTION

            Different results from base R cor() function than similarity() function in recommenderlab package?
            Asked 2019-Jun-19 at 17:26

            Can anyone explain why these two correlation matrices return different results?

            ...

            ANSWER

            Answered 2019-Jun-19 at 17:26

            The dissimilarity() = 1 - pmax(cor(), 0) R base function. Also, it is important to specify the method for both of them to use the same one:

            Source https://stackoverflow.com/questions/56669777

            QUESTION

            R how to get association rules (LHS, RHS, support, confidence, lift) from recommenderlab object?
            Asked 2019-Apr-11 at 11:10

            i'm current construct product recommendation using R recommenderlab, after compute AR recommender, i'm hoping to understand the association rules, but i couldn't found any why to extract the complete association rules from the recommender object.

            Below is the sample dataset

            ...

            ANSWER

            Answered 2019-Apr-11 at 11:10

            QUESTION

            R "HybridRecommender" in recommenderlab package unable to predict "binaryRatingMatrix"
            Asked 2019-Apr-07 at 01:28
            I'm trying to apply "HybridRecommender" on "binaryRatingMatrix" type data, but i got an error when trying to predict "topNList".

            I'm current running R-64bit (version 3.4.4) on windows machine with recommenderlab version 0.2-2

            Below is the sample dataset

            ...

            ANSWER

            Answered 2019-Apr-07 at 01:28

            Is a bug and the issue solved on latest development version (version 0.2-4.1), current available on Github. Kindly check the details Here

            Source https://stackoverflow.com/questions/55507364

            QUESTION

            R list save as quoted list
            Asked 2018-Dec-26 at 13:22

            Want to save recommenderlab predict list as list of "" seperated list. I have one question in place for the same but here want to extend it with a twist.

            I already tried few approaches and found below as relavent but stuck with a simple step of putting the ouptput in "" comma seperated script.

            ...

            ANSWER

            Answered 2018-Dec-26 at 13:22

            Given that cat(paste0(shQuote(list1[["291"]]),collapse=",")) produces the string of movie recommendations, one could do the following to turn this into a data frame tagged with a name:

            Source https://stackoverflow.com/questions/53931469

            QUESTION

            Predict using userid in recommenderlab
            Asked 2018-Dec-19 at 13:59

            I have a recommendation problem that is fairly simple: I would like build a hybrid recommender with recommenderlab in R where I recommend already liked movies in the MovieLense data set together with popular movies and some random movies.

            ...

            ANSWER

            Answered 2018-Dec-19 at 13:59

            You just need to precise that you are recommending items to the user or users from the training dataset as followed :

            Source https://stackoverflow.com/questions/53851262

            QUESTION

            Data looks different after converting to realRatingMatrix
            Asked 2018-May-10 at 02:56

            I am trying to work on a recommendation system in R. Data Set below: https://drive.google.com/file/d/1FVh-Xg3NBtzKgZHnDTi7IjaATW_fPmW9/view?usp=sharing

            ...

            ANSWER

            Answered 2018-May-10 at 02:56

            I got the answer:

            There are some users in the data who have rated the same beer more than once (twice/thrice... etc.). So recommenderLabs when coercing data into realRatingMatrix adds the rating of such rows and that's why value of ratings are more than 5 and length of getRatings is less than nrow of beer_data.

            E.g. sample beer_data

            beer_beerid, review_profilename, review_overall

            19667, 57md, 3.5 19667, 57md, 4.0

            so in realRatingMatrix for user="57md" and item = "19667" rating = 3.5+4 = 7.5 and 1 row gets reduced in realRatingMatrix.

            And due to the same reason, non unique combination of beer_beerid and rating getting combined which is causing mismatch in count of rating in both objects, dataframe and realRatingMatrix.

            Source https://stackoverflow.com/questions/50206701

            QUESTION

            writing first row (column headers) to a vector
            Asked 2018-Apr-26 at 09:48

            I have a matrix I have coerced from a realRatingMatrix in recommenderlab package in R. The data contains predictions of ratings between 0-1 for a number of products.

            The matrix should contain customer numbers along the rows (row 2 down) so that column 1 header is row label, and product IDs along the columns in the first row from column 2 onwards. The problem I have is when I coerce to a matrix the data structure becomes messy:

            EDIT: Link to Github repository www.github.com/APBuchanan/recommenderlab-model

            ...

            ANSWER

            Answered 2018-Apr-26 at 09:48

            So with the data you gave, I whipped up a solution here.

            You said "I need to extract the customer numbers from the test split of data and drop that into the first column of the matrix - that's my main issue". The way to extract that is either: colnames(wsratings) or dimnames(wsratings)[[2]].

            Once you have this vector (length of 320), you want to "drop that to the first column". You're asking for a cbind(), but the length of the data you want to bind it contains 43 row. You can't bind them together because the length of the two elements are not the same or multiples of each other.

            Assuming you have the full dataset and their length matches, then the code would be:

            Source https://stackoverflow.com/questions/50023548

            QUESTION

            binaryRatingMatrix in recommenderlab package
            Asked 2018-Apr-17 at 14:10

            I am trying to build a product recommendation model using binary data.

            I have an issue with my code that I think stems from how the structure of my source data changes when I pass the function data.matrix=as(df,"binaryRatingMatrix")

            My code is as follows:

            ...

            ANSWER

            Answered 2018-Apr-17 at 14:10

            Well I've figured it out - for some reason, between reading in my csv and coercing to "binaryRating Matrix" I had to convert df to a matrix first.

            Source https://stackoverflow.com/questions/49879755

            QUESTION

            could not find function "spread"
            Asked 2017-Sep-11 at 03:40

            So at the moment I am trying to figure out how to build a movie recommender system from MovieLense (https://grouplens.org/datasets/movielens/100k/). I read some instructions from a tutorial.

            ...

            ANSWER

            Answered 2017-Sep-11 at 03:08

            Try replacing library(dplyr) with library(tidyverse). The spread function now lives in the tidyr package which is part of the tidyverse along with dplyr.

            Source https://stackoverflow.com/questions/46147632

            QUESTION

            Testing Recommendation systems: How to specify how many items were given for the prediction. `calcPredictionAccuracy` function
            Asked 2017-Jul-28 at 04:34

            I am trying to test a binary recommendation systems I created with the recommenderlab package. When I run the calcPredictionAccuracy function I get the following error:

            Error in .local(x, data, ...) : You need to specify how many items were given for the prediction! I have performed numerous searches and can't seem to find any solution to this issue. If I try to add the given argument the error changes to:

            error.ubcf<-calcPredictionAccuracy(p.ubcf, getData(test_index, "unknown", given=3)) Error in .local(x, ...) : unused argument (given = 3)

            Here is a quick look at my code:

            my data set is binary.watch.ratings

            ...

            ANSWER

            Answered 2017-Jul-28 at 04:34

            for topNList, you must specify the number of items you want back. So you add these with the predict() function call:

            Source https://stackoverflow.com/questions/45303215

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install recommenderlab

            Stable CRAN version: install from within R with. Current development version: Download package from AppVeyor or install from GitHub (needs devtools).

            Support

            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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