Want a physical copy of this material? R CMD check automatically checks your code for common problems.
Paul Torfs and Claudia Brauer not so short introduction More locally, I have taken tutorials originally written by Roger Ratcliff and various graduate students on how to do analysis of variance using S and adapated them to the R environment.
This guide was developed to help others learn R, and also to help students in Research MethodsPersonality ResearchPsychometric TheoryStructural Equation Modelingor other courses do some basic statisics. To download a copy of the software, go to the download section of the cran. A detailed pdf of how to download R and some of the more useful packages is available as part of the personality-project.
See his post here.
He also has written various tutorials on using R for regression and analysis of variance. Their pages were very useful when I started to learn R.
There is a growing number of text books that introduce R.
Ripley and William N. For the psychometrically minded, my psychometrics text in progress has all of its examples in R. The R help listserve is a very useful source of information. Just lurking will lead to the answers for many questions.
Much of what is included in this tutorial was gleaned from comments sent to the help list. The most frequently asked questions have been organized into a FAQ.
The archives of the help group are very useful and should be searched before asking for help. Jonathan Baron maintains a searchable database of the help list serve.
Back to Top General Comments R is not overly user friendly at first. Its error messages are at best cryptic. It is, however, very powerful and once partially mastered, easy to use.
And it is free. Even more important than the cost is that it is an open source language which has become the lingua franca of statistics and data analysis.
That is, as additional modules are added, it becomes even more useful.
Modules included allow for multilevel hierarchical linear modeling, confirmatory factor analysis, etc. I believe that it is worth the time to learn how to use it. They include a one page pdf summary sheet of commands that is well worth printing out and using.
A four page summary sheet of commands was contributed by Tom Short. Using R in 12 simple steps for psychological research These steps are not meant to limit what can be done with R, but merely to describe how to do the analysis for the most basic of research projects and to give a first experience with R.
Install R on your computer or go to a machine that has it. Download the psych package as well as other recommended packages from CRAN using the install. To get packages recommended for a particular research field, use the ctv package to install a particular task view.
Note, these first two steps need to be done only once!The R Journal is the open access, refereed journal of the R project for statistical computing. It features short to medium length articles on the use, and development of R, including packages, programming tips, CRAN news, and foundation news.
R.W. Knudsen Family ® is proud to be an official participant of the Non-GMO Project. For more information about the Non-GMO Project or to view our entire list of verified products to date, visit initiativeblog.com A key benefit for this project was the fact that R, unlike Excel and other GUI analysis programs, is completely auditable.
Many add-on packages and the R distributions live in CRAN, the. From there, you can obtain versions converted to plain ASCII text, GNU info, HTML, PDF, as well as the Texinfo source used for creating all these formats using the GNU Texinfo system.
You can also obtain the R FAQ from the doc/FAQ subdirectory of a CRAN site (see What is CRAN? Unofficial read-only mirror of all CRAN R packages - cran. R has great graphics and plotting capabilities and can produce a wide range of plots very easily. The following is an R plot gallery with a selection of different R plot types and graphs that were all generated with R.