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?