Introduction to R for SAS/SPSS/Stata Users
Monday, December 3, 2012 at 10:00 AM - Wednesday, December 5, 2012 at 2:00 PM (PST)
This is a 2-day virtual course that runs on December 3rd & 5th from 10am-2pm PST
An Introduction to R for SAS, SPSS, and Stata Users
R is free and powerful software for data analysis and graphics. However, its flexible approach is so different from other software that it can be frustrating to learn. This 16-hour workshop introduces R in a way that takes advantage of what you already know. For many topics we will begin with add-on commands that work similarly to your current software. Then we will cover R’s built-in commands that provide simpler but more flexible output. We will also discuss aspects of R that are likely to trip you up. For example, many R functions let you specify which data set to use in a way that looks identical to SAS, but which differs in a way that is likely to lead you to perplexing error messages.
We will devote most of our time to working through examples that you may run simultaneously on your computer. However, handouts will include each step and its output if you prefer instead just relax and take notes. Most examples come from the books R for SAS and SPSS Users, R for Stata Users, and http://r4stats.com. That makes it easy to review what we did later with full explanations, or to learn more about a particular subject by extending an example which you have already learned.
After each 4-hour session you will receive a set of practice exercises for you to do on your own time, as well as solutions to the problems. The instructor will be available after the workshop via email to address these problems or any other topic in the workshop.
Prerequisites: Attendees should know how to program in SAS, SPSS or Stata and be familiar with basic statistical methods including linear regression and basic analysis of variance.
Learning Outcomes: When finished, you will be able to use R to import data, manage and transform it, create publication quality graphics, perform commonly used statistical analyses and know how to generalize that knowledge to more advanced methods. You will also have an especially thorough understanding of how R compares to SAS, SPSS and Stata.
Presenter: Robert A. Muenchen is the author of the books, R for SAS and SPSS Users, and, with Joseph Hilbe, R for Stata Users. A consulting statistician with 30 years of experience, Bob is currently the manager of Research Computing Support (formerly the Statistical Consulting Center) at the University of Tennessee. Bob has served on the advisory boards of SPSS Inc., the Statistical Graphics Corporation and PC Week Magazine. His suggested improvements and/or programming code have been incorporated into SAS, SPSS, JMP, STATGRAPHICS and several R packages.
Course Outline (Data management topics have been moved to a separate workshop)
- Introduction and statement of goals
- Overview of R
- Installing and maintaining R
- Programming Language Basics – including creating, subsetting and analyzing vectors (variables), factors (categorical variables), data frames (data sets), matrices, arrays and lists.
- Managing your files and workspace – R provides a complete environment that includes many commands for listing, printing, saving, deleting data as well as examining object structure.
- Controlling functions (procedures or commands) using arguments (options or parameters) or an object's class; how to change class
- Data Acquisition – reading comma- and tab-delimited files, Excel, SAS, SPSS & Stata
- Selecting variables and observations – R offers many more ways to do selection
- Writing functions (macros)
- Traditional graphics (similar to old SAS and SPSS graphics) including bar, scatter, strop, box plots, histograms, plotting groups, adding embellishments and regression fits.
- Lattice graphics (similar to new SAS SG* and Stata graphics) – a brief overview
- The Grammar of Graphics approach using the ggplot2 package (similar to SPSS GPL) including: qplot vs. ggplot; bar charts, histograms, scatter, strip, multi-layered plots; group plots, adding embellishments and fit lines.
- Interactive graphics – a brief overview (similar to JMP, SAS/INSIGHT, SAS/IML Studio)
- Graphics resources
- Descriptive statistics done both the SAS/SPSS/Stata way and the R way
- Crosstabulation done both the SAS/SPSS/Stata way and the R way
- “By” or “split file” processing of groups
- Correcting p-values for the effects of multiple testing
- Correlation: Pearson, Spearman
- Linear regression
- Extractor functions (like Stata’s postestimation commands)
- t-test & Wilcoxon Mann-Whitney rank sum test
- Paired t-test & Wilcoxon signed-rank test
- Analysis of variance, Kruskal-Wallis & post hoc tests
- Getting publication-quality output into Word, LibreOffice, HTML and LaTeX
- Ways to run R
- Programs that include other programs
- Running R from within SAS and SPSS
- Running R as an adjunct to Stata
- Graphical User Interfaces: R Commander, JGR, Rattle, Excel
- Summary of topics learned
We have the right to cancel the event for any reason at any time. Revolution Analytics will refund all monies paid for ticket sales in full in the event of a cancellation. We are not responsible for any travel related expenses incurred by attendees for this event. This includes but not limited to transportation, hotel accommodations or any other travel related expenses secured by the attendee, due to a cancellation on our part.
30 days from event date Full refund less 10% of the paid ticket price
21 days from event date 50% of paid ticket price
Within 15 days of event date Non refundable