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What is R in computer science?
R is a programming language and free software environment for statistical computing and graphics supported by the R Core Team and the R Foundation for Statistical Computing. The R language is widely used among statisticians and data miners for developing statistical software and data analysis.
What is statistical R?
R and its libraries implement various statistical and graphical techniques, including linear and nonlinear modeling, classical statistical tests , spatial and time-series analysis, classification, clustering, and others. R is easily extensible through functions and extensions, and its community is noted for contributing packages. Many of R's standard functions are written in R, which makes it easy for users to follow the algorithmic choices made. For computationally intensive tasks, C, C++, and Fortran code can be linked and called at run time. Advanced users can write C, C++, Java, .NET or Python code to manipulate R objects directly. R is highly extensible through the use of packages for specific functions and specific applications. Due to its S heritage, R has stronger object-oriented programming facilities than most statistical computing languages. Extending it is facilitated by its lexical scoping rules.
What is R data structure?
Like languages such as APL and MATLAB, R supports matrix arithmetic. R's data structures include vectors, matrices, arrays, data frames (similar to tables in a relational database) and lists. Arrays are stored in column-major order. R's extensible object system includes objects for (among others): regression models, time-series and geo-spatial coordinates. R has no scalar data type. Instead, a scalar is represented as a length-one vector.
What is R in computer?
R is an interpreted language; users typically access it through a command-line interpreter. If a user types 2+2 at the R command prompt and presses enter, the computer replies with 4, as shown below:
What is the R software environment?
The official R software environment is a GNU package. It is written primarily in C, Fortran, and R itself (partially self-hosting) and is available under the GNU General Public License. Precompiled executables are provided for various operating systems. It has a command line interface. Multiple third-party graphical user interfaces are available, such as RStudio, an integrated development environment; and Jupyter, a notebook interface .
What is R used for?
R is a programming language and free software environment for statistical computing and graphics supported by the R Core Team and the R Foundation for Statistical Computing. The R language is widely used among statisticians and data miners for developing statistical software and data analysis.
When was S created?
S was created by John Chambers in 1976 while at Bell Labs. A commercial version of S was offered as S-PLUS starting in 1988. Much of the code written for S-PLUS runs unaltered in R. In 1991 Ross Ihaka and Robert Gentleman at the University of Auckland, New Zealand, began an alternative implementation of the basic S language, ...
What does the letter R mean in English?
The letter ⟨r⟩ is used to form the ending "-re", which is used in certain words such as centre in some varieties of English spelling, such as British English. Canadian English also uses the "-re" ending, unlike American English, where the ending is usually replaced by "-er" ( center ).
When was the letter R written?
The descending stroke of the Latin letter R has fully developed by the 3rd century BC, as seen in the Tomb of the Scipios sarcophagus inscriptions of that era. From around 50 AD, the letter P would be written with its loop fully closed, assuming the shape formerly taken by R .
What is a trilled R?
A good example of a trilled R is in the Spanish word for dog, perro. In William Shakespeare 's Romeo and Juliet, such a reference is made by Juliet's nurse in Act 2, scene 4, when she calls the letter R "the dog's name". The reference is also found in Ben Jonson 's English Grammar.
What is the minuscule form?
The minuscule (lowercase) form ( r) developed through several variations on the capital form. Along with Latin minuscule writing in general, it developed ultimately from Roman cursive via the uncial script of Late Antiquity into the Carolingian minuscule of the 9th century.
What is the R Foundation?
The R Foundation. The R Foundation is a not for profit organization working in the public interest. It has been founded by the members of the R Development Core Team in order to. Provide support for the R project and other innovations in statistical computing.
Is R a GNU project?
R is an official part of the Free Software Foundation ’s GNU project, and the R Foundation has similar goals to other open source software foundations like the Apache Foundation or the GNOME Foundation.
What is R in chemistry?
R- a unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air
What does R mean in movies?
R 1. A trademark for a movie rating indicating that admission will be granted only to persons of or over a certain age, usually 17, unless accompanied by a parent or guardian.
What is restricted rating?
4. restricted: a motion-picture rating advising that children under 17 will not be admitted unless accompanied by an adult. Compare G (def. 2),NC-17, PG,PG-13,X (def. 7).
What is the intrinsic rate of increase of a population?
the intrinsic rate of increase of a population, equivalent to the difference between the birth and death rates divided by the number of individuals in the population. Also called Malthusian parameter.
What is a movie rating?
A trademark for a movie rating indicating that admission will be granted only to persons of or over a certain age, usually 17, unless accompanied by a parent or guardian.
Which alphabet evolved by the ancient Romans?
Latin alphabet, Roman alphabet- the alphabet evolved by the ancient Romans which serves for writing most of the languages of western Europe
What Is R and What Are the Advantages?
The R programming language has a lot going for it. Here is a list of some of its major strong points:
What is R Used For?
Although R is a popular language used by many programmers, it is especially effective when used for
What Are the Most Popular R Packages?
R packages are defined as collections of R functions, sampled data, documentation, and compiled code. These elements are stored in a directory called “library” within the R environment and are installed by default during installation.
What Is R and Which Language Is Better: Python or R?
According to StatisticsTimes, C is the top programming language as of August 2021 (R is in fourth place on the list). But both Python and R are popular and have their share of adherents. But which one is the best?
How many packages are there in R?
It has lots of packages. For example, the R language has more than 10,000 packages stored in the CRAN repository, and the number is continuously increasing.
Why is R so cost effective?
It’s platform-independent. R runs on all operating systems, so developers only need to create one program that can work on competing systems. This independence is yet another reason why R is cost-effective!
What programming language is used in many industries?
Thanks to its versatility, many different industries use the R programming language. Here is a list of industries/disciplines that use the R programming language:
What is R in statistics?
R provides a wide variety of statistical (linear and nonlinear modelling, classical statistical tests, time-series analysis, classification, clustering, …) and graphical techniques, and is highly extensible. The S language is often the vehicle of choice for research in statistical methodology, and R provides an Open Source route to participation in that activity.
What is R in computing?
R is a language and environment for statistical computing and graphics. It is a GNU project which is similar to the S language and environment which was developed at Bell Laboratories (formerly AT&T, now Lucent Technologies) by John Chambers and colleagues. R can be considered as a different implementation of S.
What is R software?
R is an integrated suite of software facilities for data manipulation, calculation and graphical display. It includes
What are the strengths of R?
One of R’s strengths is the ease with which well-designed publication-quality plots can be produced, including mathematical symbols and formulae where needed. Great care has been taken over the defaults for the minor design choices in graphics, but the user retains full control.
Is R a free software?
R is available as Free Software under the terms of the Free Software Foundation ’s GNU General Public License in source code form. It compiles and runs on a wide variety of UNIX platforms and similar systems (including FreeBSD and Linux), Windows and MacOS.
Is R a statistical system?
Many users think of R as a statistics system. We prefer to think of it as an environment within which statistical techniques are implemented. R can be extended (easily) via packages. There are about eight packages supplied with the R distribution and many more are available through the CRAN family of Internet sites covering a very wide range of modern statistics.
What is help in R?
The help () function and ? help operator in R provide access to the documentation pages for R functions, data sets, and other objects, both for packages in the standard R distribution and for contributed packages. To access documentation for the standard lm (linear model) function, for example, enter the command help (lm) or help ("lm"), or ?lm or ?"lm" (i.e., the quotes are optional).
What are standard names in R?
Standard names in R consist of upper- and lower-case letters, numerals ( 0-9 ), underscores ( _ ), and periods (. ), and must begin with a letter or a period. To obtain help for an object with a non-standard name (such as the help operator ? ), the name must be quoted: for example, help ('?') or ?"?".
What is rsitesearch?
RSiteSearch () uses an internet search engine (also see below) to search for information in function help pages and vignettes for all CRAN packages, and in CRAN task views (described below ). Unlike the apropos () and help.search () functions, RSiteSearch () requires an active internet connection and doesn’t employ regular expressions. Braces may be used to specify multi-word terms; otherwise matches for individual words are included. For example, RSiteSearch (" {generalized linear model}") returns information about R functions, vignettes, and CRAN task views related to the term "generalized linear model" without matching the individual words "generalized", "linear", or "model".
What is a task view in R?
CRAN Task Views are documents that summarize R resources on CRAN in particular areas of application, helping your to navigate the maze of thousands of CRAN packages. A list of available Task Views may be found on CRAN.
What is apropos in R?
The apropos () function searches for objects, including functions, directly accessible in the current R session that have names that include a specified character string. This may be a literal string or a regular expression to be used for pattern-matching (see ?"regular expression" ). By default, string matching by apropos () is case-insensitive. For example, apropos ("^glm") returns the names of all accessible objects that start with the (case-insensitive) characters "glm".
What is help.start in R?
help.start () starts and displays a hypertext based version of R’s online documentation in your default browser that provides links to locally installed versions of the R manuals, a listing of your currently installed packages and other documentation resources.
Is it good to ask for help in R?
Before asking others for help, it’s generally a good idea for you to try to help yourself. R includes extensive facilities for accessing documentation and searching for help . There are also specialized search engines for accessing information about R on the internet, and general internet search engines can also prove useful ( see below ).
What is the purpose of controlling, organizing, and govern your use of R packages?
Control, organize, and govern your use of R packages to increase reproducibility and decrease the time you spend installing and troubleshooting.
What is RStudio software?
RStudio provides free and open source tools for R and enterprise-ready professional software for data science teams to develop and share their work at scale.
Overview
R is a programming language for statistical computing and graphics supported by the R Core Team and the R Foundation for Statistical Computing. Created by statisticians Ross Ihaka and Robert Gentleman, R is used among data miners, bioinformaticians and statisticians for data analysis and developing statistical software. Users have created packages to augment the functions of the R lang…
History
R is an open-source implementation of the S programming language combined with lexical scoping semantics from Scheme, which allow objects to be defined in predetermined blocks rather than the entirety of the code. S was created by Rick Becker, John Chambers, Doug Dunn, Jean McRae, and Judy Schilling at Bell Labs around 1976. Designed for statistical analysis, the language is an interpreted language whose code could be directly run without a compiler. Many programs writte…
Features
R's data structures include vectors, arrays, lists, and data frames. Vectors are ordered collections of values and can be mapped to arrays of one or more dimensions in a column major order. That is, given an ordered collection of dimensions, one fills in values along the first dimension first, then fill in one-dimensional arrays across the second dimension, and so on. R supports array arithmetics and in this regard is like languages such as APL and MATLAB. The special case of a…
Packages
R's capabilities are extended through user-created packages, which offer statistical techniques, graphical devices, import/export, reporting (RMarkdown, knitr, Sweave), etc. These packages and their easy installation and use has been cited as driving the language's widespread adoption in data science. The packaging system is also used by researchers to organize research data, code and report files in a systematic way for sharing and archiving.
Interfaces
Various applications can be used to edit or run R code.
Early developers preferred to run R via the command line console, succeeded by those who prefer an IDE. IDEs for R include (in alphabetical order) R.app (OSX/macOS only), Rattle GUI, R Commander, RKWard, RStudio, and Tinn-R. R is also supported in multi-purpose IDEs such as Eclipse via the StatET plugin, and Visual Studio via the R Tools for Visual Studio. Of these, RStudio is the most co…
Implementations
The main R implementation is written in R, C, and Fortran. Several other implementations aimed at improving speed or increasing extensibility. A closely related implementation is pqR (pretty quick R) by Radford M. Neal with improved memory management and support for automatic multithreading. Renjin and FastR are Java implementations of R for use in a Java Virtual Machine. CXXR, rho, and Riposte are implementations of R in C++. Renjin, Riposte, and pqR attempt to impr…
Communities
R has local communities worldwide for users to network, share ideas, and learn.
A growing number of R events bring users together, such as conferences (e.g. useR!, WhyR?, conectaR, SatRdays), meetups, as well as R-Ladies groups that promote gender diversity. The R Foundation taskforce focuses on women and other under-represented groups.
useR! conferences
The official annual gathering of R users is called "useR!". The first such event was useR! 2004 in May 2004, Vienna, Austria. After skipping 2005, the useR! conference has been held annually, usually alternating between locations in Europe and North America. History:
• useR! 2006, Vienna, Austria
• useR! 2007, Ames, Iowa, US
Overview
R, or r, is the eighteenth letter of the modern English alphabet and the ISO basic Latin alphabet. Its name in English is ar , plural ars, or in Ireland or /ˈɔːr/.
The letter ⟨r⟩ is the eighth most common letter in English and the fourth-most common consonant (after ⟨t⟩, ⟨n⟩, and ⟨s⟩).
The letter ⟨r⟩ is used to form the ending "-re", which is used in certain words such as centre in so…
Name
The name of the letter in Latin was er (/ɛr/), following the pattern of other letters representing continuants, such as F, L, M, N and S. This name is preserved in French and many other languages. In Middle English, the name of the letter changed from /ɛr/ to /ar/, following a pattern exhibited in many other words such as farm (compare French ferme) and star (compare German Stern).
In Hiberno-English the letter is called /ɒr/ or /ɔːr/, somewhat similar to oar, ore, orr.
History
The original Semitic letter may have been inspired by an Egyptian hieroglyph for tp, "head". It was used for /r/ by Semites because in their language, the word for "head" was rêš (also the name of the letter). It developed into Greek 'Ρ' ῥῶ (rhô) and Latin R.
The descending diagonal stroke develops as a graphic variant in some Wester…
Pronunciation and use
⟨r⟩ represents a rhotic consonant in many languages, as shown in the table below.
Other languages may use the letter ⟨r⟩ in their alphabets (or Latin transliterations schemes) to represent rhotic consonants different from the alveolar trill. In Haitian Creole, it represents a sound so weak that it is often written interchangeably with ⟨w⟩, e.g. 'Kweyol' for 'Kreyol'.
Brazilian Portuguese has a great number of allophones of /ʁ/ such as [χ], [h], [ɦ], [x], [ɣ], [ɹ] and [r]…
Related characters
• R with diacritics: Ŕ ŕ Ɍ ɍ Ř ř Ŗ ŗ Ṙ ṙ Ȑ ȑ Ȓ ȓ Ṛ ṛ Ṝ ṝ Ṟ ṟ Ꞧ ꞧ Ɽ ɽ R̃ r̃ ᵲ ꭨ ᵳ ᶉ
• International Phonetic Alphabet-specific symbols related to R: 𝼈 ɹ ɺ ɾ ɻ ɽ ʀ ʁ ʶ ˞ ʴ
• IPA superscript letters: 𐞦 𐞧 𐞨 𐞩 𐞪
• Obsolete and nonstandard symbols in the International Phonetic Alphabet: ɼ ɿ
See also
• Guttural R
External links
• Media related to R at Wikimedia Commons
• The dictionary definition of R at Wiktionary
• The dictionary definition of r at Wiktionary