R FAQs about R Basics

Here are R FAQS about R Basics. Questions and answers will be updated frequently and on the demand of visitors.

Question: On what Operating Systems R Language can Run.
Answer: R Language can run on Unix, Linux and Windows Operating System.

Question: On what machine R can Run?
Answer: R is developed for Unix-like, Windows and Mac families of operating systems. The current version of R Language is configured to run on machine such as cpu-linux-gnu for i386, amd64, alpha, arm/armel, hppa, ia64, m68k, mips/mipsel, powerpc, s390 and sparc CPUs, i386-hurd-gnu, cpu-kfreebsd-gnu for i386 and amd64, powerpc-apple-darwin, mips-sgi-irix, i386-freebsd, rs6000-ibm-aix and sparc-sun-solaris.

Question: What is the current version of R?
Answer: The current released version of R is 3.2.2.

Question: How and where from R can be obtained?
Answer: Sources, binaries and documentation of R language can be obtained via Comprehensive R Archive Network (CRAN).

Question: How to install R on Windows Operating System?
Answer: The “bin/windows” directory of CRAN site contains binaries for a base distribution and add-on packages from CRAN to run on Windows XP, Vista, Windows 7 etc (32-bit or 64bit versions of Windows) on ix86 and x86_64 chips.

Question: What is CRAN?
Answer: The CRAN is “Comprehensive R Archive Network”. CRAN is a collection of sites which carry identical material, consisting R distribution(s), the contributed extensions, documentation for R and binaries.

The CRAN master site is https://CRAN.R-project.org at WU (Wirtschaftsuniversität Wien) in Austria.

The mirros are include
http://cran.at.R-project.org/    (Wirtschaftsuniversität Wien, Austria)
http://cran.au.R-project.org/    (University of Melbourne, Australia)
http://cran.br.R-project.org/    (Universidade Federal do Paraná, Brazil)
http://cran.ch.R-project.org/    (ETH Zürich, Switzerland)
http://cran.dk.R-project.org/    (dotsrc.org, Aalborg, Denmark)
http://cran.es.R-project.org/    (Spanish National Research Network, Madrid, Spain)
http://cran.pt.R-project.org/    (Universidade do Porto, Portugal)
http://cran.uk.R-project.org/    (U of Bristol, United Kingdom)


Reference: Hornik, K., (2015). R FAQs, https://CRAN.R-project.org/doc/FAQ/R-FAQ.html.

R FAQS about Packages

Question: What version of R do I run on my computer or laptop?

Answer: To get the information about version of R, sue the following command at R prompt.

# get version of R

You will get result like
[1] “R version 3.2.1 (2015-06-18)”

Question: What R packages are already installed?

Answer: To get a list of installed packages in R, write “library()” without quotation marks at the R prompt. R will first list all of the packages installed in local R directory of your computer system and then it will list all packages installed globally on your computer system.

# list all R packages installed

You would get results like (note that results below are given as example only, its not a complete list)

Packages in library ‘C:/Users/abcd/Documents/R/win-library/3.2’::
combinat     combinatorics utilities
proftools      Output Processing Tools for R
rgl                3D visualization device system (OpenGL)

Packages in library ‘C:/Program Files/R/R-3.2.1/library’:
KernSmooth      Functions for kernel smoothing for Wand & Jones (1995)
MASS                Support Functions and Datasets for Venables and Ripley’s MASS