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Data Visualization using R

Data Visualization using R. Audit Technology Group Mar 22 th , 2013. DV in the News – Gun Owners Put on Map. DV in the News – Gun Owners Retaliated. DV in the News – Home Ownership. What is R?. From Wikipedia

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Data Visualization using R

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  1. Data Visualization using R Audit Technology Group Mar 22th, 2013

  2. DV in the News – Gun Owners Put on Map

  3. DV in the News – Gun Owners Retaliated

  4. DV in the News – Home Ownership

  5. What is R? • From Wikipedia • R is an open source programming language and software environment for statistical computing and graphics. • The R language is widely used among statisticians for developing statistical software and data analysis. • R is an implementation of the S programming language created by John Chambers while at Bell Labs. • R was created by Ross Ihaka and Robert Gentleman at the University of Auckland, New Zealand.

  6. More about R • Some interesting facts • R is now developed by the R Development Core Team, of which Chambers is a member • R is named partly after the first names of the first two R authors (Robert Gentleman and Ross Ihaka), and partly as a play on the name of S. • R is part of the GNU project. The source code for the R software environment is written primarily in C, Fortran, and R. • R is freely available under the GNU General Public License, and pre-compiled binary versions are provided for various operating systems.

  7. What should R Concern me as an Auditor? • Good question! • R uses a command line interface; however, several graphical user interfaces are available for use with R. • R provides a wide variety of statistical and graphical techniques, including linear and nonlinear modeling, classical statistical tests, time-series analysis, classification, clustering, and others. • According to Rexer's Annual Data Miner Survey in 2010, R has become the data mining tool used by more data miners (43%) than any other.

  8. More Importantly • Last but not least • Another strength of R is static graphics, which can produce publication-quality graphs, including mathematical symbols. Dynamic and interactive graphics are available through additional packages. • In other words, if you are serious about data visualization, using only Excel graphing features is not enough. • At the end of the day, it is FREE! All you need is filing a deviation form with your supervisor’s approval, and some weekends spent in front of your computer screen.

  9. R Heat Map is Perfect for Risk Analysis • Heat Map is a very useful tool for Risk Analysis • But Excel does not have built-in Heat Map feature • You can mimic a Heat Map in Excel using Bubble Chart but it is a labor intensive process with less than satisfactory result • Or you can learn a little VBA and write your own code to create Heat Maps in Excel, once again, not a completely painless proposition

  10. Heat Map: Correlation Between Genes

  11. Heat Map: NBA Top Scorers

  12. Calendar Heat Map: Stock Close Price

  13. Heat Map: Pollution Data on Calendar

  14. Showing Data on US Map by State

  15. Graphing Rainfall in France

  16. Topology Graph

  17. Topography Graph with Height

  18. Data Visualization in Action 1

  19. Data Visualization in Action 2

  20. Interactive Graph – U.S. Data by State

  21. Interactive Graph – Hurricane Andrew

  22. Interactive Graph – U.S. City Popularity

  23. Q&A • Question? • Comments?

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