It is built upon the LoCoH method but contains with new analytical functions for data that have time values attached e. T-LoCoH can analyze any set of point data with or without time stampsbut it has been tailored for data collected at regular intervals from a GPS device, such as GPS collars used in wildlife tracking studies.
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! Activate the psych package or other desired packages using e.
This needs to be done every time you start R. Or, it is possible to modify the startup parameters for R so that certain libraries are loaded automatically. Enter your data using a text editor and save as a text file perhaps comma delimited if using a spreadsheet program such as Excel or OpenOffice Read the data file or copy and paste from the clipboard using, e.
Find basic descriptive statistics e. Prepare a simple descriptive graph e. Find the correlation matrix to give an overview of relationships if the number is not too great, a scatter plot matrix or SPLOM plot is very useful, this can be done with pairs.
If you have an experimental variable, do the appropriate multiple regression using standardized or at least zero centered scores. If you want to do a factor analysis or principal components analysis, use the fa or principal functions.
To score items and create a scale and find various reliability estimates, use score. Getting started Installing R on your computer Although it is possible that your local computer lab already has R, it is most useful to do analyses on your own machine.
In this case you will need to download the R program from the R project and install it yourself. Using your favorite web browser, go to the R home page at http: This will take you to list of mirror sites around the world.To Top.
Select a Page: Hide Navigation; Home; About the project; Adopted Deer. This two-day course covers one of the most exciting and current topics within the R community.
Although traditionally R has not been used for Big Data analytics due to its limitations, recent R packages have provided much-needed connectivity for out-of-memory processing with popular Big Data tools such as Hadoop, Spark, SQL and NoSQL databases etc.
The book Applied Predictive Modeling features caret and over 40 other R packages. It is on sale at Amazon or the the publisher’s website.
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THE ULTIMATE DRIVER JOURNEY! Project CARS 2 delivers the soul of motor racing in the world’s most beautiful, authentic, and technically-advanced racing regardbouddhiste.com: $ Welcome to modEvA project! modEvA is an R package for species distribution model evaluation and analysis.
It includes functions for variation partitioning, calculating several measures of model discrimination and calibration, optimizing prediction thresholds based on a number of criteria, performing multivariate environmental similarity surface (MESS) analysis, and displaying various.