PPT-Market Basket Analysis, Frequent Itemsets, Association Rules, A-priori Algorithms, Other

What Modelling technique which is traditionally used by retailers to understand customer behaviour It works by looking for combinations of items that occur together frequently in transactions Advantages. itemsets. : alternative representations and combinatorial problems. Too many frequent . itemsets. If {. a. 1. , . …. , a. 100. } . is a frequent . itemset. , then there are. . 1.27*10. 30 . frequent sub-patterns. November 5. th. , 2013. Parallel Association Rule Mining. Outline. Background of Association Rule Mining. Apriori Algorithm. Parallel Association Rule Mining. Count Distribution. Data Distribution. Candidate Distribution. Apriori( . DB. , . minsup. ):. C. = {all 1-itemsets}. . // candidates = singletons. while. ( |. C. | > 0 ):. make pass over . DB. , find counts of . C. . F. = sets in . C. . with count .  . . Special Topics in DBs. Large-Scale Data Management. Advanced Analytics . on Hadoop. Spring 2013. WPI, Mohamed Eltabakh. 1. Data Analytics. Include machine learning and data mining tools. Analyze/mine/summarize large datasets. itemsets. : alternative representations and combinatorial problems. Too many frequent . itemsets. If {. a. 1. , . …. , a. 100. } . is a frequent . itemset. , then there are. . 1.27*10. 30 . frequent sub-patterns. Bamshad Mobasher. DePaul . University. 2. Market Basket Analysis. Goal of MBA is to find associations (affinities) among groups of items occurring in a transactional database. has roots in analysis of point-of-sale data, as in supermarkets. Market Basket. Many-to-many relationship between different objects. The relationship is between items and baskets (transactions). Each basket contains some items (itemset) that is typically less than the total amount of items. ASSOCIATION RULES,. APRIORI ALGORITHM,. OTHER ALGORITHMS. Market Basket Analysis and Association Rules. Market Basket Analysis studies characteristics or attributes that “go together”. Seeks to uncover associations between 2 or more attributes.. What Is Association Rule Mining?. Association rule mining. . is finding frequent patterns or associations among sets of items or objects, usually amongst transactional data. Applications include Market Basket analysis, cross-marketing, catalog design, etc.. Association Rules. A-Priori Algorithm. Other Algorithms. Jeffrey D. Ullman. Stanford University. 2. The Market-Basket Model. A large set of . items. , e.g., things sold in a supermarket.. A large set of . Data Mining – Fall 2014. Indian Statistical Institute Kolkata. August 4 and 7, 2014. Transaction id. Items. 1. Bread, Ham, Juice,. Cheese, Salami, Lettuce. 2. Rice, . Dal, Coconut, Curry leaves, Coffee, Milk, Pickle. By. Shailaja K.P. Introduction. Imagine that you are a sales manager at . AllElectronics. , and you are talking to a customer who recently bought a PC and a digital camera from the store. . What should you recommend to her next? . : A Candidate Generation & Test Approach. Apriori. pruning principle. : If there is any . itemset. which is infrequent, its superset should not be generated/tested! (. Agrawal. & . Srikant. Hyun-sung Jang . (National Institute of Aerospace / NASA Langley Research Center). with . Xu Liu, Daniel Zhou, Wan Wu, Allen Larar, and Qiguang Yang . The 24. th. International TOVS Study Conferences, .