Data mining


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Data mining

  1. 1. Data Mining Group Members Alisha Korpal Nivia Jain Sharuti Jain
  2. 2. Data Mining ? <ul><li>Huge amounts of data </li></ul><ul><li>Electronic record of our decisions </li></ul><ul><ul><ul><ul><li>Choices in the supermarket </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Financial records </li></ul></ul></ul></ul>
  3. 3. Data vs. Information
  4. 4. <ul><li>Data : Collection of raw data , </li></ul><ul><li>facts and figures. </li></ul><ul><li>Information : processed form of data </li></ul>
  5. 5. Data Mining <ul><li>Extracting or “mining” knowledge from large amounts of data </li></ul><ul><li>Data – driven discovery and modeling of hidden patterns in large volumes of data </li></ul><ul><li>Extraction of interesting (non trivial, implicit, previously and potentially useful) information or patterns from data in large databases . </li></ul>
  6. 6. Data Mining Process <ul><li>Defining the problem </li></ul><ul><li>Preparing data </li></ul><ul><li>Exploring data </li></ul><ul><li>Building Models </li></ul><ul><li>Exploring and validating Models </li></ul><ul><li>Deploying and Updating models </li></ul>
  7. 7. Data Mining Process
  8. 8. Defining the Problem <ul><li>What are you looking for? What types of relationships are you trying to find? </li></ul><ul><li>Do you want to make predictions from the data mining model, or just look for interesting patterns and associations? </li></ul>
  9. 9. Contd… <ul><li>Which attribute of the dataset do you want to try to predict? </li></ul><ul><li>How are the columns related? If there are multiple tables, how are the tables related? </li></ul><ul><li>Does the problem you are trying to solve reflect the policies or processes of the business? </li></ul>
  10. 10. Preparing Data
  11. 11. Exploring Data <ul><li>You must understand the data in order to make appropriate decisions when you create the mining models. Exploration techniques include calculating the minimum and maximum values, calculating mean and standard deviations, and looking at the distribution of the data.  </li></ul>
  12. 12. Models <ul><li>Building Models </li></ul><ul><li>Exploring and Validating Models </li></ul><ul><li>Deploying and Updating Models </li></ul>
  13. 13. Evolution of Data Mining <ul><li>Data collection -1960s </li></ul><ul><li>Data access - 1980s </li></ul><ul><li>Data Warehousing & decision support -1990s </li></ul><ul><li>Data Mining -Emerging Today </li></ul>
  14. 14. Prospective, proactive information delivery Advanced algorithms, multiprocessor computers, massive databases &quot;What’s likely to happen to Boston unit sales next month? Why?&quot; Data Mining (Emerging Today) Retrospective, dynamic data delivery at multiple levels On-line analytic processing (OLAP), multidimensional databases, data warehouses &quot;What were unit sales in New England last March? Drill down to Boston.&quot; Data Warehousing & Decision Support (1990s) Retrospective, dynamic data delivery at record level Relational databases (RDBMS), Structured Query Language (SQL), ODBC &quot;What were unit sales in New England last March?&quot; Data Access (1980s) Retrospective, static data delivery Computers, tapes, disks &quot;What was my total revenue in the last five years?&quot; Data Collection (1960s) Characteristics Enabling Technologies Business Question Evolutionary Step
  15. 15. Data mining Vs OLAP <ul><ul><li>On-line Analytical Processing </li></ul></ul><ul><ul><ul><ul><ul><li>Provides you with a very good view of what is happening, but can not predict what will happen in the future or why it is happening </li></ul></ul></ul></ul></ul>
  16. 16. Scope of Data Mining <ul><li>Automated prediction of trends and behaviors </li></ul><ul><li>Automated discovery of previously unknown patterns </li></ul>
  17. 17. Applications <ul><li>Science: Chemistry, Physics, Medicine </li></ul><ul><ul><ul><ul><li>Biochemical analysis </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Remote sensors on a satellite </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Medical images analysis </li></ul></ul></ul></ul>
  18. 18. Applications <ul><li>Financial Industry, Banks, Businesses, E commerce </li></ul><ul><ul><ul><li>Stock and investment analysis </li></ul></ul></ul><ul><ul><ul><li>Risk management </li></ul></ul></ul><ul><ul><ul><li>Sales forecasting </li></ul></ul></ul>
  19. 19. Applications <ul><li>Database analysis and decision support </li></ul><ul><ul><ul><li>Market analysis and management </li></ul></ul></ul><ul><ul><ul><ul><li>Target marketing, customer relation management, market basket analysis, cross selling </li></ul></ul></ul></ul>
  20. 20. Applications <ul><li>Risk analysis and management </li></ul><ul><ul><ul><li>Forecasting, customer retention, improved underwriting </li></ul></ul></ul><ul><ul><ul><li>Fraud detection and management </li></ul></ul></ul>
  21. 21. References: <ul><li> </li></ul><ul><li> </li></ul>
  22. 22. References: <ul><li>http:// </li></ul><ul><li> </li></ul><ul><li> </li></ul>
  23. 23. Conclusion
  24. 24. Result of Data Mining <ul><li>What may happen in future </li></ul><ul><li>Classifying people or things into groups by recognizing patterns </li></ul><ul><li>Clustering people or things into groups based on their attributes </li></ul><ul><li>Sequencing what events are likely to lead to later events </li></ul>
  25. 25. Data Mining is not <ul><li>“ Blind” applications of algorithms </li></ul><ul><li>Going to find relations where none exist </li></ul><ul><li>Presenting data in different ways </li></ul><ul><li>A difficult to understand technology requiring an advanced degree in computer science </li></ul>
  26. 26. Necessity is the mother of invention
  27. 27. Thank you