R is free software for data analysis and graphics that is similar to SAS and SPSS. Two million people are part of the R Open Source Community. Its use is growing very rapidly and Revolution Analytics distributes a commercial version of R that adds capabilities that are not available in the Open Source version. This 60-minute webinar is for people who are familiar with SAS or SPSS who want to know how R can strengthen their analytics strategy.
5 Source: r4stats.com/popularity 6 http://r4stats.com/popularity1. Data input & management (data step) * SAS Approach;2. Analytics & graphics procedures (proc step) DATA A; SET A;3. Macro language logX = log(X);4. Matrix language PROC REG;5. Output management systems (ODS/OMS) MODEL Y = logX;R integrates these all seamlessly. # R Approach lm( Y ~ log(X) ) 7 8
Vast selection of analytics & graphics New methods are available sooner Many packages can run R (SAS, SPSS, Excel…) Its object orientation “does the right thing” Its language is powerful & fully integrated Procedures you write are on an equal footing It is the universal language of data analysis It runs on any computer Being open source, you can study and modify it It is free 9 10* Using SAS; Language is somewhat harder to learnPROC TTEST DATA=classroom; Help files are sparse & complexCLASS gender; Must find R and its add-ons yourselfVAR score; Graphical user interfaces not as polished Most R functions hold data in main memory# In R Rule-of-thumb: 10 million values per gigabytet.test(score ~ gender, data=classroom) SAS/SPSS: billions of records Several efforts underway to break R’s memory limitt.test(posttest, pretest , paired=TRUE, data=classroom) including Revolution Analytics’ distribution 11 12
Base R plus Recommended Packages like: Email support is free, quick, 24-hours: Base SAS, SAS/STAT, SAS/GRAPH, SAS/IML Studio www.r-project.org/mail.html SPSS Stat. Base, SPSS Stat. Advanced, Regression Stackoverflow.com Tested via extensive validation programs Quora.com But add-on packages written by… Crossvalidated stats.stackexchange.com Professor who invented the method? /questions/tagged/r A student interpreting the method? Phone support available commercially 13 141. Go to cran.r-project.org, Comprehensive R Archive Network the Comprehensive R Archive Network Crantastic.com2. Download binaries for Base & run Inside-R.org3. Add-ons: R4Stats.com install.packages(“myPackage”)4. To update: update.packages() 15 16
34 33 A company focused on R development & support Run by SPSS founder Norman Nie Their enhanced distribution of R: Revolution R Enterprise Free for colleges and universities, including for outside consulting 35
R for SAS and SPSS Users, Muenchen R for Stata Users, Muenchen & Hilbe R Through Excel: A Spreadsheet Interface for Statistics, Data Analysis, and Graphics, Heiberger & Neuwirth Data Mining with Rattle and R: The Art of Excavating Data for Knowledge Discovery, Williams 53 54 R is powerful, extensible, free Download it from CRAN Academics download Revolution R Enterprise for free at www.revolutionanalytics.com You run it many ways & from many packages email@example.com Several graphical user interfaces are available Rs programming language is the way Slides: r4stats.com/misc/webinar Presentation: bit.ly/R-sas-spss to access its full power 55