Explore Courses
Liverpool Business SchoolLiverpool Business SchoolMBA by Liverpool Business School
  • 18 Months
Bestseller
Golden Gate UniversityGolden Gate UniversityMBA (Master of Business Administration)
  • 15 Months
Popular
O.P.Jindal Global UniversityO.P.Jindal Global UniversityMaster of Business Administration (MBA)
  • 12 Months
New
Birla Institute of Management Technology Birla Institute of Management Technology Post Graduate Diploma in Management (BIMTECH)
  • 24 Months
Liverpool John Moores UniversityLiverpool John Moores UniversityMS in Data Science
  • 18 Months
Popular
IIIT BangaloreIIIT BangalorePost Graduate Programme in Data Science & AI (Executive)
  • 12 Months
Bestseller
Golden Gate UniversityGolden Gate UniversityDBA in Emerging Technologies with concentration in Generative AI
  • 3 Years
upGradupGradData Science Bootcamp with AI
  • 6 Months
New
University of MarylandIIIT BangalorePost Graduate Certificate in Data Science & AI (Executive)
  • 8-8.5 Months
upGradupGradData Science Bootcamp with AI
  • 6 months
Popular
upGrad KnowledgeHutupGrad KnowledgeHutData Engineer Bootcamp
  • Self-Paced
upGradupGradCertificate Course in Business Analytics & Consulting in association with PwC India
  • 06 Months
OP Jindal Global UniversityOP Jindal Global UniversityMaster of Design in User Experience Design
  • 12 Months
Popular
WoolfWoolfMaster of Science in Computer Science
  • 18 Months
New
Jindal Global UniversityJindal Global UniversityMaster of Design in User Experience
  • 12 Months
New
Rushford, GenevaRushford Business SchoolDBA Doctorate in Technology (Computer Science)
  • 36 Months
IIIT BangaloreIIIT BangaloreCloud Computing and DevOps Program (Executive)
  • 8 Months
New
upGrad KnowledgeHutupGrad KnowledgeHutAWS Solutions Architect Certification
  • 32 Hours
upGradupGradFull Stack Software Development Bootcamp
  • 6 Months
Popular
upGradupGradUI/UX Bootcamp
  • 3 Months
upGradupGradCloud Computing Bootcamp
  • 7.5 Months
Golden Gate University Golden Gate University Doctor of Business Administration in Digital Leadership
  • 36 Months
New
Jindal Global UniversityJindal Global UniversityMaster of Design in User Experience
  • 12 Months
New
Golden Gate University Golden Gate University Doctor of Business Administration (DBA)
  • 36 Months
Bestseller
Ecole Supérieure de Gestion et Commerce International ParisEcole Supérieure de Gestion et Commerce International ParisDoctorate of Business Administration (DBA)
  • 36 Months
Rushford, GenevaRushford Business SchoolDoctorate of Business Administration (DBA)
  • 36 Months
KnowledgeHut upGradKnowledgeHut upGradSAFe® 6.0 Certified ScrumMaster (SSM) Training
  • Self-Paced
KnowledgeHut upGradKnowledgeHut upGradPMP® certification
  • Self-Paced
IIM KozhikodeIIM KozhikodeProfessional Certification in HR Management and Analytics
  • 6 Months
Bestseller
Duke CEDuke CEPost Graduate Certificate in Product Management
  • 4-8 Months
Bestseller
upGrad KnowledgeHutupGrad KnowledgeHutLeading SAFe® 6.0 Certification
  • 16 Hours
Popular
upGrad KnowledgeHutupGrad KnowledgeHutCertified ScrumMaster®(CSM) Training
  • 16 Hours
Bestseller
PwCupGrad CampusCertification Program in Financial Modelling & Analysis in association with PwC India
  • 4 Months
upGrad KnowledgeHutupGrad KnowledgeHutSAFe® 6.0 POPM Certification
  • 16 Hours
O.P.Jindal Global UniversityO.P.Jindal Global UniversityMaster of Science in Artificial Intelligence and Data Science
  • 12 Months
Bestseller
Liverpool John Moores University Liverpool John Moores University MS in Machine Learning & AI
  • 18 Months
Popular
Golden Gate UniversityGolden Gate UniversityDBA in Emerging Technologies with concentration in Generative AI
  • 3 Years
IIIT BangaloreIIIT BangaloreExecutive Post Graduate Programme in Machine Learning & AI
  • 13 Months
Bestseller
IIITBIIITBExecutive Program in Generative AI for Leaders
  • 4 Months
upGradupGradAdvanced Certificate Program in GenerativeAI
  • 4 Months
New
IIIT BangaloreIIIT BangalorePost Graduate Certificate in Machine Learning & Deep Learning (Executive)
  • 8 Months
Bestseller
Jindal Global UniversityJindal Global UniversityMaster of Design in User Experience
  • 12 Months
New
Liverpool Business SchoolLiverpool Business SchoolMBA with Marketing Concentration
  • 18 Months
Bestseller
Golden Gate UniversityGolden Gate UniversityMBA with Marketing Concentration
  • 15 Months
Popular
MICAMICAAdvanced Certificate in Digital Marketing and Communication
  • 6 Months
Bestseller
MICAMICAAdvanced Certificate in Brand Communication Management
  • 5 Months
Popular
upGradupGradDigital Marketing Accelerator Program
  • 05 Months
Jindal Global Law SchoolJindal Global Law SchoolLL.M. in Corporate & Financial Law
  • 12 Months
Bestseller
Jindal Global Law SchoolJindal Global Law SchoolLL.M. in AI and Emerging Technologies (Blended Learning Program)
  • 12 Months
Jindal Global Law SchoolJindal Global Law SchoolLL.M. in Intellectual Property & Technology Law
  • 12 Months
Jindal Global Law SchoolJindal Global Law SchoolLL.M. in Dispute Resolution
  • 12 Months
upGradupGradContract Law Certificate Program
  • Self paced
New
ESGCI, ParisESGCI, ParisDoctorate of Business Administration (DBA) from ESGCI, Paris
  • 36 Months
Golden Gate University Golden Gate University Doctor of Business Administration From Golden Gate University, San Francisco
  • 36 Months
Rushford Business SchoolRushford Business SchoolDoctor of Business Administration from Rushford Business School, Switzerland)
  • 36 Months
Edgewood CollegeEdgewood CollegeDoctorate of Business Administration from Edgewood College
  • 24 Months
Golden Gate UniversityGolden Gate UniversityDBA in Emerging Technologies with Concentration in Generative AI
  • 36 Months
Golden Gate University Golden Gate University DBA in Digital Leadership from Golden Gate University, San Francisco
  • 36 Months
Liverpool Business SchoolLiverpool Business SchoolMBA by Liverpool Business School
  • 18 Months
Bestseller
Golden Gate UniversityGolden Gate UniversityMBA (Master of Business Administration)
  • 15 Months
Popular
O.P.Jindal Global UniversityO.P.Jindal Global UniversityMaster of Business Administration (MBA)
  • 12 Months
New
Deakin Business School and Institute of Management Technology, GhaziabadDeakin Business School and IMT, GhaziabadMBA (Master of Business Administration)
  • 12 Months
Liverpool John Moores UniversityLiverpool John Moores UniversityMS in Data Science
  • 18 Months
Bestseller
O.P.Jindal Global UniversityO.P.Jindal Global UniversityMaster of Science in Artificial Intelligence and Data Science
  • 12 Months
Bestseller
IIIT BangaloreIIIT BangalorePost Graduate Programme in Data Science (Executive)
  • 12 Months
Bestseller
O.P.Jindal Global UniversityO.P.Jindal Global UniversityO.P.Jindal Global University
  • 12 Months
WoolfWoolfMaster of Science in Computer Science
  • 18 Months
New
Liverpool John Moores University Liverpool John Moores University MS in Machine Learning & AI
  • 18 Months
Popular
Golden Gate UniversityGolden Gate UniversityDBA in Emerging Technologies with concentration in Generative AI
  • 3 Years
Rushford, GenevaRushford Business SchoolDoctorate of Business Administration (AI/ML)
  • 36 Months
Ecole Supérieure de Gestion et Commerce International ParisEcole Supérieure de Gestion et Commerce International ParisDBA Specialisation in AI & ML
  • 36 Months
Golden Gate University Golden Gate University Doctor of Business Administration (DBA)
  • 36 Months
Bestseller
Ecole Supérieure de Gestion et Commerce International ParisEcole Supérieure de Gestion et Commerce International ParisDoctorate of Business Administration (DBA)
  • 36 Months
Rushford, GenevaRushford Business SchoolDoctorate of Business Administration (DBA)
  • 36 Months
Liverpool Business SchoolLiverpool Business SchoolMBA with Marketing Concentration
  • 18 Months
Bestseller
Golden Gate UniversityGolden Gate UniversityMBA with Marketing Concentration
  • 15 Months
Popular
Jindal Global Law SchoolJindal Global Law SchoolLL.M. in Corporate & Financial Law
  • 12 Months
Bestseller
Jindal Global Law SchoolJindal Global Law SchoolLL.M. in Intellectual Property & Technology Law
  • 12 Months
Jindal Global Law SchoolJindal Global Law SchoolLL.M. in Dispute Resolution
  • 12 Months
IIITBIIITBExecutive Program in Generative AI for Leaders
  • 4 Months
New
IIIT BangaloreIIIT BangaloreExecutive Post Graduate Programme in Machine Learning & AI
  • 13 Months
Bestseller
upGradupGradData Science Bootcamp with AI
  • 6 Months
New
upGradupGradAdvanced Certificate Program in GenerativeAI
  • 4 Months
New
KnowledgeHut upGradKnowledgeHut upGradSAFe® 6.0 Certified ScrumMaster (SSM) Training
  • Self-Paced
upGrad KnowledgeHutupGrad KnowledgeHutCertified ScrumMaster®(CSM) Training
  • 16 Hours
upGrad KnowledgeHutupGrad KnowledgeHutLeading SAFe® 6.0 Certification
  • 16 Hours
KnowledgeHut upGradKnowledgeHut upGradPMP® certification
  • Self-Paced
upGrad KnowledgeHutupGrad KnowledgeHutAWS Solutions Architect Certification
  • 32 Hours
upGrad KnowledgeHutupGrad KnowledgeHutAzure Administrator Certification (AZ-104)
  • 24 Hours
KnowledgeHut upGradKnowledgeHut upGradAWS Cloud Practioner Essentials Certification
  • 1 Week
KnowledgeHut upGradKnowledgeHut upGradAzure Data Engineering Training (DP-203)
  • 1 Week
MICAMICAAdvanced Certificate in Digital Marketing and Communication
  • 6 Months
Bestseller
MICAMICAAdvanced Certificate in Brand Communication Management
  • 5 Months
Popular
IIM KozhikodeIIM KozhikodeProfessional Certification in HR Management and Analytics
  • 6 Months
Bestseller
Duke CEDuke CEPost Graduate Certificate in Product Management
  • 4-8 Months
Bestseller
Loyola Institute of Business Administration (LIBA)Loyola Institute of Business Administration (LIBA)Executive PG Programme in Human Resource Management
  • 11 Months
Popular
Goa Institute of ManagementGoa Institute of ManagementExecutive PG Program in Healthcare Management
  • 11 Months
IMT GhaziabadIMT GhaziabadAdvanced General Management Program
  • 11 Months
Golden Gate UniversityGolden Gate UniversityProfessional Certificate in Global Business Management
  • 6-8 Months
upGradupGradContract Law Certificate Program
  • Self paced
New
IU, GermanyIU, GermanyMaster of Business Administration (90 ECTS)
  • 18 Months
Bestseller
IU, GermanyIU, GermanyMaster in International Management (120 ECTS)
  • 24 Months
Popular
IU, GermanyIU, GermanyB.Sc. Computer Science (180 ECTS)
  • 36 Months
Clark UniversityClark UniversityMaster of Business Administration
  • 23 Months
New
Golden Gate UniversityGolden Gate UniversityMaster of Business Administration
  • 20 Months
Clark University, USClark University, USMS in Project Management
  • 20 Months
New
Edgewood CollegeEdgewood CollegeMaster of Business Administration
  • 23 Months
The American Business SchoolThe American Business SchoolMBA with specialization
  • 23 Months
New
Aivancity ParisAivancity ParisMSc Artificial Intelligence Engineering
  • 24 Months
Aivancity ParisAivancity ParisMSc Data Engineering
  • 24 Months
The American Business SchoolThe American Business SchoolMBA with specialization
  • 23 Months
New
Aivancity ParisAivancity ParisMSc Artificial Intelligence Engineering
  • 24 Months
Aivancity ParisAivancity ParisMSc Data Engineering
  • 24 Months
upGradupGradData Science Bootcamp with AI
  • 6 Months
Popular
upGrad KnowledgeHutupGrad KnowledgeHutData Engineer Bootcamp
  • Self-Paced
upGradupGradFull Stack Software Development Bootcamp
  • 6 Months
Bestseller
KnowledgeHut upGradKnowledgeHut upGradBackend Development Bootcamp
  • Self-Paced
upGradupGradUI/UX Bootcamp
  • 3 Months
upGradupGradCloud Computing Bootcamp
  • 7.5 Months
PwCupGrad CampusCertification Program in Financial Modelling & Analysis in association with PwC India
  • 5 Months
upGrad KnowledgeHutupGrad KnowledgeHutSAFe® 6.0 POPM Certification
  • 16 Hours
upGradupGradDigital Marketing Accelerator Program
  • 05 Months
upGradupGradAdvanced Certificate Program in GenerativeAI
  • 4 Months
New
upGradupGradData Science Bootcamp with AI
  • 6 Months
Popular
upGradupGradFull Stack Software Development Bootcamp
  • 6 Months
Bestseller
upGradupGradUI/UX Bootcamp
  • 3 Months
PwCupGrad CampusCertification Program in Financial Modelling & Analysis in association with PwC India
  • 4 Months
upGradupGradCertificate Course in Business Analytics & Consulting in association with PwC India
  • 06 Months
upGradupGradDigital Marketing Accelerator Program
  • 05 Months

Simple Guide to Build Recommendation System Machine Learning

Updated on 22 November, 2022

6.9K+ views
7 min read

Most of today’s internet businesses tend to offer a personalized user experience. A recommendation system in machine learning is a particular type of personalized web-based application that provides users with personalized recommendations about content in which they may be interested. The recommendation system is also known as the recommender system.

What Is a Recommendation System?

A recommendation system in machine learning can predict the requirements of a bunch of things for a user and recommend the top things that may be needed.

Recommendation systems are one of the most widespread applications of machine learning technologies applied for businesses.

We can find large scale recommendation systems in retail, video on demand, or music streaming.

Recommendation systems attempt to robotize parts of a unique data revelation model, where individuals attempt to discover others with comparable tastes, and later request that they recommend new items.

Join the Machine Learning Course online from the World’s top Universities – Masters, Executive Post Graduate Programs, and Advanced Certificate Program in ML & AI to fast-track your career.

Types of a Recommendation System

  1.     Personalized- recommendation based on your interest.
  2.     Non-personalized- what other customers are looking at right now.

What Is The Need For a Recommendation System?

One of the key reasons why we need a recommendation system in machine learning is that, due to the internet, people have too many options from which they can choose to buy.

In the past, people used to shop at physical stores, where the availability of items was limited.

For instance, the number of films placed at a video rental store depended on the size of the store. The web allows people to access plenty of online resources. Netflix has a great collection of movies. As the quantum of available information increased, a new problem arose and people found it difficult to choose from a wide variety of options. Hence, the recommendation systems came into use. 

Where are Recommendation Systems Used?

  • Large e-commerce sites use this tool to suggest items a consumer may wish to purchase.
  • Web personalization.

How Does the Recommendation System Work?

  • We can suggest things to a client that are generally popular among other clients.
  • We can divide the clients into several groups as per their product choices and suggest the things they may buy.

Both of the above techniques have their disadvantages. In the first case, the most popular, mainstream things would be the same for every client. Hence, everybody will probably receive similar suggestions. While in the second one, as the number of clients increases, the number of things highlighted as suggestions will also increase. Thus, it will be difficult to group all the clients under different sections. 

Now, we will see how the recommendation system works.

Data Collection

This is the first, most important step in creating a recommendation system. The information is frequently gathered by two methods: explicit and implicit.

Explicit information will be data given deliberately, i.e., the contribution made by clients like film reviews. Implicit information is the data that isn’t given purposefully, yet gathered from accessible information streams, for example, clicks, search history, request history, and so on.

Data Repository

The volume of information indicates the honesty of the suggestions of the model. The information type has an important role in picking data from a large population. The capacity can comprise a standard SQL and NoSQL information base or a form of article stockpiling.

Data Filtration

After collection and storage, this data needs to be filtered to extract the information for making the final recommendations. Various algorithms make the filtering process easier.

Algorithms for Recommendation System

Software systems give suggestions to users utilizing historical iterations and attributes of items/users.

There are two methods to construct a recommendation system.

1. Content-based recommendation

  • Uses attributes of items/users
  • Recommend items similar to the ones liked by the user in the past

2. Collaborative filtering

  • Recommend items liked by similar users
  • Enable exploration of diverse content

Content-Based Recommendation

Supervised machine learning induces a classifier to distinguish between interesting and uninteresting user items.

The objective of a recommendation system is to forecast the scores for unrated things of the users. The fundamental thought behind content filtering is that everything has a few highlights x.

For instance, the film “Love at last” is a romance film and has a high score for highlight x1, however a low score for x2.

   (Movie Ratings Data) 

Source

Every individual has a parameter θ which tells how much they love romance films, and how much they love action films.

If θ = [1, 0.1], the individual loves romance films however not action films.

We can locate the optimal θ with linear regression for every individual.

(Notation)

r(i,j): 1 if user j has rated movie i (0 otherwise)

y(i,j): user j rating on movie i (if defined)

θ(j): user vector parameter

x(i): movie i feature vector 

predicted rating [user j, movie i]: (θ(j))ᵀx(i)

m(j): # number of movies user j rates

nᵤ: # of users

n: # of features of a movie 

Read: Machine Learning Project Ideas & Topics

Collaborative Filtering

The downside of content filtering is that it needs side data for everything.

For instance, classification like romance and action are the side data of films. It is costly to locate someone who watches films and adds side data for each film out there. 

Basic Assumptions

  • Users with similar interests have a common preference.
  • Sufficiently large numbers of user preferences are available.

Main Approaches

  • User-based
  • Item-based

How can one possibly list out all the features of movies? What if one wants to add a new feature? Should we add the new feature to all the movies?

Collaborative filtering solves this problem.

(Predicts the feature of the movie) Source

Problems & Maintenance with Recommendation System in Machine Learning

Problems

  • The inconclusive user input structure
  • Looking for users to participate in criticism studies
  • Weak calculations
  • Poor results
  • Poor information
  • Lack of information
  • Privacy control (may not unequivocally team up with receipts)

Maintenance

  • Costly
  • Information gets obsolete
  • Information quality (enormous, circle space development)

Recommendation systems in machine learning have their roots in various research areas, such as information retrieval, text classification, and applying different methods from varied sections such as machine learning, data mining, and knowledge-based systems.

The Future of Recommendation System

  • Extract understood negative appraisals through the examination of the things brought back.
  • How to incorporate the local area with proposals.
  • Recommendation systems will be utilized later on to anticipate interest for items, empowering prior correspondence back to the store network.

Upgrade Your Career in Machine Learning with upGrad

If you’re interested to learn more about machine learning, check out IIIT-B & upGrad’s Executive PG Programme in Machine Learning & AI which is designed for working professionals and offers 450+ hours of rigorous training, 30+ case studies & assignments, IIIT-B Alumni status, 5+ practical hands-on capstone projects & job assistance with top firms.

Frequently Asked Questions (FAQs)

1. Where can you find recommendation systems in real life?

A recommendation system or recommender system can be conceptualized as a data filtering application that employs machine learning for functioning. Recommendation systems are widely used nowadays to send recommendations to specific user groups or individual consumers about the most relevant products or services. It searches for particular patterns hidden within customer behavior data, collects the information either explicitly or implicitly, and then generates recommendations accordingly. Some of the most reputed brands that use recommendation systems are Google, Netflix, Facebook, and Amazon, among other global organizations. In fact, studies suggest that 35 percent of Amazon’s overall purchases are a result of product recommendations.

2. Which companies are using artificial intelligence today?

Starting from enhancing customer experience to boosting business productivity across industries and advancing operational efficiency, organizations are heavily investing in artificial intelligence nowadays. In fact, knowingly or unknowingly, all of us are constantly exposed to artificial intelligence in our daily lives too. Apart from Tesla, Apple, and Google, some other well-known organizations successfully using AI today include names like Twitter, Uber, Amazon, YouTube, etc. Twitter has been employing artificial intelligence and natural language processing since 2017, and Netflix focuses its entire operations around data and AI.

3. What are the top AI jobs in India today?

With massive developments ongoing in the field of artificial intelligence, there has been an unprecedented demand in the market for artificial intelligence professionals. As a result, the industry looks quite promising for those who wish to carve out a niche in this field of technology, with an array of exciting job options that pay handsomely too. Some of the top-ranking jobs in the field of artificial intelligence today include roles of principal data scientist, AI research engineer, computer scientist, machine learning engineer, with annual salaries ranging from INR 9.5 to 18 lakhs and even more, based on work experience, skillset, and other different factors.