Have you ever wondered how Netflix gives you movie suggestions? Have you ever shopped in Amazon and are amazed at how they recommend the apt products for you? As a techie have you always dreamed of writing code that will enable you to achieve the above objects?. Then you need not look further than this video. This video tutorial explains the framework of recommender systems with a live case example. It teaches the user to apply collaborative filtering using the Alternating Least Squares Method.
This video was prepared by Mr. Nitin Misra Sr VP and Chief Data Scientist of 360digiTMG - the training arm of INNODATATICS ( US). He has a rich experience of almost 17 years and is a successful data scientist with abilities in Business Analytics, Project Management, and Quality Management.
Collaborative filtering in its narrowest sense is a technique of making automatic predictions about the interests of a user by collecting the interests, preferences, and tastes of many users. The Alternating Least Squares Method is a very popular algorithm for making recommendations. Alternative Least Squares Method recommender is a Matrix Factorization algorithm that uses Alternating Least Squares Method with weighted lambda (‏גּ) regularisation.
This video tutorial begins with an introduction of the Matrix Factorisation method with an example. It continues with a detailed description of the types recommender system, content filtering, and collaborative filtering. Collaborative filtering is then dealt with in great depth with appropriate examples. The merits and demerits of the Memory-Based Collaborative Filtering Method and the Model-Based Collaborative Filtering Method are discussed in detail as well.
The video ends with a hands-on step by step illustration in Microsoft Excel of Matrix Factorization method and applying the Alternating Least Squares Method to achieve collaborative filtering of data sets.

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360digiTMG is a 5-year-old training & consulting organization led by stalwarts of the industry who are alumnus of premier institutions like the Indian Institute of Technology, Indian Institute of Management and Indian School of Business. 360digiTMG since its inception has been the forerunner in the space of management and niche programs that aid in up-skilling and cross skilling executives across various levels and domains. 360digiTMG has been conducting training programs across the globe for corporate and individuals alike.
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