Category «R Basics»

R Basic FAQs

Question: How to start (Run) R Language in Windows Operating System?
Answer: In Microsoft Windows, during installation the R installer will have created a Start menu item and an icon for R on your system’s desktop. Double click R icon from desktop or from start menu list to Run R program. For windows 7, 8 or 10, you can use search term like “R x64 3.2.1” (64 bit version) or “R i386 3.2.1” (32 bit version). R GUI will launch.

Question: How R can be used as calculator.
Answer: Starting R will open the console where user can type commands. To use R as calculator one have to enter the arithmetical expression after > prompt. For example

> 5 + 4
> sqrt(37)
> 2*4^2+17*4-3

Question: How to Quit R session?
Answer: In R console on R command prompt just type

> q( )

Question: What is q()?
Answer: The q() is a function that is used to tell R to quit. When q() is entered in R console and press Enter key, you will be asked whether to save an image of the current workspace or not or to cancel. Note that only typing q tells R to show the content of this function. The action of this function is to quit R.

Question: What is workspace in R?
Answer: The workspace in R is an image that contains a record of the computations one have done and it may contain some saved results.

Question: How to record work in R?
Answer: Rather than saving the workspace, one can record all the commands that one have entered in R console. Recording work in R, the R workspace can be reproduced. The easiest way is to enter the commands in R’s script editor available in the File menu of R GUI.

Question: What is R Script Editor?
Answer: R script editor is a place where one can enter commands. Commands can be executed by highlighting them and hitting CTRL+R (mean RUN). At the end of a R session one can save the final script for a permanent record of one’s work. A text editor such as Notepad can also be used for this purpose.
Note that in R console only one command can be entered at a time because after pressing Enter key the R command executed immediately.

 

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.

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