R is an open source software package, licensed under the GNU General Public License (GPL). This means that you can install R for free on most desktop and server machines. (Comparable commercial software packages sell for hundreds or thousands of dollars.) R is very good at plotting graphics, analyzing data, and fitting statistical models using any data.
Some packages have been tried for quantitative and graphical statistical analysis like, 'MSBVAR' : for calculating RMSE and MAE; 'plotrix' : to draw various plots like time series plots etc; 'Hmisc' : The Hmisc library contains many functions useful for data analysis and high-level graphics; 'verification' : package for verification utilities.
Even search engine like Google and social networking site like Facebook are using R package to get their user hits statistics.
Capability:
Even search engine like Google and social networking site like Facebook are using R package to get their user hits statistics.
Capability:
You can find implementations for hundreds (maybe thousands) of statistical and data analysis algorithms in R. No commercial package offers anywhere near the scope of functionality available through the Comprehensive R Archive Network (CRAN).
Performance:
R's performance is comparable and superior to most commercial statistical analysis packages. R requires you to load data sets into memory before processing. If you have enough memory to hold the data, R can run very quickly.
More details can be found at http://www.r-project.org/
