# Recommend ## Convert Rating Matrix ### Input Data Before using the **Recommender**, the data should be converted into **User-Item Rating matrix** form. | Variables | Inputs | | --------------- | --------------------------------------------------------------------- | | **Target Data** | Data input | | **Matrix Name** | Name of the matrix after conversion (fill it out at your discretion) | | **Matrix Type** | Select either 'Real Rating' or 'Binary Rating' | | **User** | User data | | **Item** | Item data | | **Rating** | Rating data | ![\[Task Information of Convert Rating Matrix\]](https://3929524962-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MGaxNdSdRN_L_WNiX4I%2F-MJKrvlizZoZIR-uR1Yd%2F-MJL2rdAc7m0D-euJUTA%2Fimage.png?alt=media\&token=eafa5aa0-769f-4ee3-94fe-c92d7b47b0fc) ## Normalize RatingMatrix ### Input Data | | Inputs | | --------------- | ------------------------------------------------------------------------ | | **Target Data** | Input data of User-Item Rating Matrix Form | | **Matrix Name** | Name of the output after normalization (fill it out at your discretion) | ![\[Task Information of Normalize RatingMatrix\]](https://3929524962-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MGaxNdSdRN_L_WNiX4I%2F-MJMF1UBPT2ptaXIhlcX%2F-MJMFXtlB5UmEQy5pWTu%2Fimage.png?alt=media\&token=aa77deb9-1ea2-4666-b464-4b6ad27360d8) ## Pair Down Matrix Used to filter the data for recommendation ### Input Data | | Inputs | | ----------------------- | ------------------------------------------------------------------------------------------------------------------ | | **Rating Matrix** | Input data of User-Item Rating Matrix Form | | **Output RatingMatrix** | Output Rating matrix | | **Arguments** | count/mean/sum of user's rating data selected by User (selected data will be included in the Output Rating Matrix) | ![\[Task Information of Pair Down Matrix\]](https://3929524962-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MGaxNdSdRN_L_WNiX4I%2F-MJMF1UBPT2ptaXIhlcX%2F-MJN6NWcbRYQQW2hRKWx%2Fimage.png?alt=media\&token=f3f946f6-b0db-447c-92fd-bbf13e510d12) ## Gen.EvaluationScheme Creates an evaluation scheme object from User-Item Rating matrix. ### Input Data | | Inputs | | -------------------- | -------------------------------------------------------------------------------------------- | | **Rating Matrix** | Input data of User-Item Rating Matrix Form | | **eva. Scheme Name** | Name of an evaluation scheme object created from a dataset (fill it out at your discretion) | ![\[Task Information of Gen. evaluatingScheme\]](https://3929524962-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MGaxNdSdRN_L_WNiX4I%2F-MJN7Jg91m_nfkMBEcIV%2F-MJN7uAyor2S1_NuttUj%2Fimage.png?alt=media\&token=db23454e-f32a-4b01-b0be-401d2a1c9d3b) ## Evaluate a Recommender Evaluates a single or a list of recommender model given an evaluation scheme. ### Input Data | | Inputs | | -------------------- | -------------------------------------------------------------------------------------------- | | **evaluationScheme** | Input data of User-Item Rating Matrix Form | | **evaluate Name** | Name of an evaluation scheme object created from a dataset (fill it out at your discretion) | ### Variable Attributes * **Model Name**: name the evaluation model * **Type**: Type of the evaluation model ex) ALS, ALS\_implicit, POPULAR, topNList etc. * **Parameter**: a list with parameters for the recommender algorithm (default=NULL) ![\[Task Information for Evaluate a Recommender\]](https://3929524962-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MGaxNdSdRN_L_WNiX4I%2F-MJN9gfcdcHDfvS5FVDC%2F-MJNC3zgKIAKFEyv2R2T%2Fimage.png?alt=media\&token=0ebb6f9a-b33e-40ed-bb7d-72b8c59fa6e1) ## IBCF(binaryRating) & IBCF(realRating)& UBCF(binaryRating)& UBCF(realRating) IBCF(item-based collaborative filtering) model UBCF(user-based collaborative filtering) model ### Input Data | | Inputs | | --------------- | ------------------------------------------------------------------------- | | **Matrix Name** | Input data of User-Item Rating Matrix Form | | **Model Name** | Name of an collaborative filtering model (fill it out at your discretion) | ![\[Task Information of IBCF (binaryRating)\]](https://3929524962-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MGaxNdSdRN_L_WNiX4I%2F-MJNDiJ_7xkBf1loAi0P%2F-MJNGef_LnM4ZNKTZIq-%2Fimage.png?alt=media\&token=a1a503ad-59b5-43e7-a3b5-d97b80651064) ## Workflow Example [R-Flow Task Example Video](https://www.youtube.com/watch?v=QOUo5_o7OXY) - Recommend
## R-Package **Convert Rating Matrix& Normalize RatingMatrix** [**https://www.rdocumentation.org/packages/recommenderlab/versions/0.2-6/topics/realRatingMatrix**](https://www.rdocumentation.org/packages/recommenderlab/versions/0.2-6/topics/realRatingMatrix) **Pair Down Matrix:** [**https://www.rdocumentation.org/packages/recommenderlab/versions/0.2-6/topics/ratingMatrix**](https://www.rdocumentation.org/packages/recommenderlab/versions/0.2-6/topics/ratingMatrix) **Gen.EvaluationScheme:** [**https://www.rdocumentation.org/packages/recommenderlab/versions/0.2-6/topics/evaluationScheme**](https://www.rdocumentation.org/packages/recommenderlab/versions/0.2-6/topics/evaluationScheme) **Evaluate a Recommender:** [**https://www.rdocumentation.org/packages/recommenderlab/versions/0.2-6/topics/evaluate**](https://www.rdocumentation.org/packages/recommenderlab/versions/0.2-6/topics/evaluate) **IBCF(binaryRating) & IBCF(realRating)& UBCF(binaryRating)& UBCF(realRating) :** [**https://www.rdocumentation.org/packages/recommenderlab/versions/0.2-6**](https://www.rdocumentation.org/packages/recommenderlab/versions/0.2-6)