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R is an integrated suite of software facilities for data manipulation, calculation and graphical display. It includes:
- an effective data handling and storage facility
- a suite of operators for calculations on arrays, in particular matrices
- a large, coherent, integrated collection of intermediate tools for data analysis
- graphical facilities for data analysis and display either on-screen or on hardcopy, and
- a well-developed, simple and effective programming language which includes conditionals, loops, user-defined recursive functions and input and output facilities.
For more information about R, please visit http://www.r-project.org/.
R and Rattle Installation:
We recommend that students stop by ITG to have R and the Rattle package installed, but for any student that is savvy enough, you can try the following (your professors will be using the Windows version in the classroom):
Download and install R (32-bit version) with default settings: http://cran.r-project.org/bin/windows/base/
Open the R Desktop icon (32 bit) and enter the following command at the R prompt:
R will ask for a CRAN mirror. Choose any nearby location.
Enter the following two commands at the R prompt. This loads the Rattle package into the library and then starts up Rattle.
If the RGtk2 package has not been installed, there will be an error popup indicating that libatk-1.0-0.dll is missing from your computer. Click OK and you will be asked to install GTK+. Click OK to do so. This downloads and installs the appropriate GTK+ libraries for your computer.
When running Rattle, other packages will be downloaded and installed as needed, with Rattle asking for the user's permission before doing so.