1. Introduction to Data Mining Dr. Sushil Kulkarni Jai Hind College (sushiltry@yahoo.co.in)

2. — Introduction to database — A Problem and A Solution — What Is Data Mining? — Goal of Data Mining — What is (not) Data Mining? — Convergence of 3 key Technologies — Data mining Functions — Kinds of Data Mining Problems Road Map

9. Purpose of Database system Data Information Knowledge Action Is to transform

22. Data Mining is …

25. Convergence of 3 key Technologies

33. Data mining Functions

37. Classification Classification Model

38. Definition of Classification Problem Given a database D={t 1 ,t 2 ,…,t n } and a set of classes C={C 1 ,…,C m }, the Classification Problem is to define a mapping f: D  C where each t i is assigned to one class .

39. Example: Credit Card Training Set Learn Classifier Test Set Model

47. Outliers Cluster 1 Cluster 2 Outliers

48. What is a natural grouping among these objects? School Employees Tatkare’s Family Males Females Clustering is subjective

49. What is Similarity? The quality or state of being similar; likeness; resemblance; as, a similarity of features. Similarity is hard to define, but… “ We know it when we see it ” The real meaning of similarity is a philosophical question. We will take a more pragmatic approach. Webster's Dictionary

55. Association Rule Discovery

58. A Weka bird is a strong brown bird which is native to New Zealand and grows to be about the same size as a chicken. The Weka was once fairly common on the North and South Islands of New Zealand but over the years has heavily declined on the North Island due to the major damage of their habitats.

62. THANKS!!