southern california edison® leading the way in electricity data visualization using r audit...

SOUTHERN CALIFORNIA EDISON®

Leading the Way in Electricity

Data Visualization using R

Audit Technology GroupMar 22th, 2013



Audit Services & Audit Technology Group

DV in the News – Gun Owners Put on Map

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DV in the News – Gun Owners Retaliated

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DV in the News – Home Ownership

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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.

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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.

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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.

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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.

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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

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Heat Map: Correlation Between Genes

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Heat Map: NBA Top Scorers

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Calendar Heat Map: Stock Close Price

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Heat Map: Pollution Data on Calendar

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Showing Data on US Map by State

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Graphing Rainfall in France

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Topology Graph

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Topography Graph with Height

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Data Visualization in Action 1

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Data Visualization in Action 2

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Interactive Graph – U.S. Data by State

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Interactive Graph – Hurricane Andrew

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Interactive Graph – U.S. City Popularity

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Q&A

• Question?

• Comments?

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southern california edison® leading the way in electricity data visualization using r audit...

Documents

r audit technology group

r language

r concern

wikipedia r

strength of r

member r

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r software environment