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nerub val

Rcmdr.com - 0 views

www.rcommander.com

shared by nerub val on 24 Apr 13 - No Cached
  • R commander (Rcmdr)
  • R commander (Rcmdr)
  • R provides a powerful and comprehensive system for analysing data and when used in conjunction with the R-commander
  • ...5 more annotations...
  • it also provides one that is easy
  • The Rcmdr program enables analysts to access a selection of commonly-used R commands using a simple interface that should be familiar to most computer users
  • A number of plugins are available that provide direct access to R packages through the Rcmdr interface
  • There are currently 29 Plugins that provide support for specific analyses, graphics, books and teaching.
    • nerub val
      nerub val on 24 Apr 13
       
      Aqui hay una lista de enlaces de plugins que proporcionan acceso directo a los paquetes de R a traves del interfaz Rcmdr
  • nerub val on 24 Apr 13
     
    Conjunto R-Commander
La morsa Peluda

Manual R commander - 0 views

www.dma.ulpgc.es/...Manual%20R%20commander.pdf

R commander

shared by La morsa Peluda on 23 Apr 13 - No Cached
  • La morsa Peluda on 23 Apr 13
     
    Tutorial sobre el uso del R Commander, con capturas de pantalla
La morsa Peluda

Tutorial R - 0 views

www.tutorialr.es/index.html

R commander

shared by La morsa Peluda on 23 Apr 13 - No Cached
    • La morsa Peluda
      La morsa Peluda on 23 Apr 13
       
      Esta página hace una breve descripción sobre el lenguaje de programación en R y menciona el R commander que facilita la utilizacion de R.
pajoje lololo

R (programming language) - Wikipedia, the free encyclopedia - 1 views

en.wikipedia.org/...R_(programming_language)

shared by pajoje lololo on 24 Apr 13 - Cached
    • David Moya
      David Moya on 24 Apr 13
       
      Anualmente se celebra un encuentro para los usuarios que utilizan el lenguaje R. Entre los últimos destinos en los que se han celebrado las reuniones, podemos destacar Rennes, Tennessee o Albacete.
  • R is an interpreted language; users typically access it through a command-line interpreter.
  • R supports matrix arithmetic
  • ...7 more annotations...
  • R's data structures include scalars, vectors, matrices, data frames (similar to tables in a relational database) and lists.
  • R's extensible object-system includes objects for (among others): regression models, time-series and geo-spatial coordinates.
  • Although mostly used by statisticians and other practitioners requiring an environment for statistical computation and software development, R can also operate as a general matrix calculation toolbox - with performance benchmarks comparable to GNU Octave or MATLAB.
  • "useR!" is the name given to the official annual gathering of R users.
  • Here is the list of useR! conference: useR! 2004, Vienna, Austria useR! 2006, Vienna, Austria useR! 2007, Ames, Iowa, USA useR! 2008, Dortmund, Germany useR! 2009, Rennes, France useR! 2010, Gaithersburg, Maryland, USA useR! 2011, Coventry, United Kingdom useR! 2012, Nashville, Tennessee, USA useR! 2013, Albacete, Spain
    • David Moya
      David Moya on 24 Apr 13
       
      R es un lenguaje basado en el uso de línea de comandos. Soporta matrices, escalares y vectores además de operar estadísticamente. Su cálculo en el ámbito de matrices es comparable a otros softwares como pueden ser Matlab o GNU Octave.
    • pajoje lololo
      pajoje lololo on 24 Apr 13
       
      Hemos elegido consultar la información general sobre R en la versión en inglés de Wikipedia, ya que nos parecía más completa y elaborada. En primer lugar se enumeran las capacidades principales de este lenguaje y algunos de sus principales usos. También se destaca el hecho de que es 'GNU project' y que está disponible bajo licencia GPL. A pesar de ser un lenguaje que utiliza la linea de comandos, se descaca que existen diversas interfaces gráficas para facilitar su uso. En un apartado posterior se enumeran algunas de las principales versiones de estas interfaces. http://en.wikipedia.org/wiki/R_(programming_language)#Graphical_user_interfaces Se destaca en varios de los apartados del artículo la enorme versatilidad y capacidad de adaptación a distintos campos que posee este lenguaje debido a la gran cantidad de paquetes y extensiones que soporta. También se indica que debido a su herencia del lenguaje S, está más dirigido a la programación orientada a objetos que la mayoria de lenguajes estadísticos. Finalmente se destaca el uso comercial que se le ha dado a este lenguaje, y encontramos ejemplos como el de Oracle y el de Revolution Analytics.
grupo empresa

R programming - R language - R commander | R statistics - 0 views

r-statistics.net

programming language R statistics

shared by grupo empresa on 24 Apr 13 - No Cached
    • grupo empresa
      grupo empresa on 24 Apr 13
       
      el lenguaje de programación R, es un lenguaje con el los elementos gráficos y los algoritmos se relacionan perfectamente, esto hace que sea un lenguaje bastante intuitivo y muy útil a nivel práctico.
  • The R programming language is a populair and easy to use programming langauge used on combination with R commander. R provides a lot of statistical and graphical functions and it is highly extensible. The best thing about R is that it is easy to plot high quality graphics.
Bora Jasan

R Statistics, R Statistical Consulting R Statistics - 0 views

www.rstatisticalsolutions.com/rstatistics.html

statistics consulting

shared by Bora Jasan on 29 Apr 13 - No Cached
  • R is mostly used by statisticians and other practitioners requiring an environment for statistical computation and software development, it can also be used as a general matrix calculation
    • LuCla EdPa
      LuCla EdPa on 29 Apr 13
       
      Pese a que se requieren conocimientos previos, es de fácil aprendizaje, y por otro lado, tiene diversas aplicaciones estadísticas
  • R is an interpreted language typically used through a command line interpreter. If one types "2+2" at the command prompt and presses enter, the computer replies with "4".
    • LuCla EdPa
      LuCla EdPa on 29 Apr 13
       
      Como hemos visto en la otra página, hace las funciones de una simple calculadora, siendo esta más potente
    • Bora Jasan
      Bora Jasan on 01 May 13
       
      Esta referencia nos muestra en qué consiste el Lenguaje de Programación R y para qué se dedica especialmente. Además, forma parte del proyecto GNU y es código abierto (libre)
  • ...2 more annotations...
    • Bora Jasan
      Bora Jasan on 06 May 13
       
      Esta referencia nos muestra en qué consiste el Lenguaje de Programación R y para qué se dedica especialmente. Además, forma parte del proyecto GNU y es código abierto (libre)
    • Bora Jasan
      Bora Jasan on 06 May 13
       
      Esta referencia nos muestra en qué consiste el Lenguaje de Programación R y para qué se dedica especialmente. Además, forma parte del proyecto GNU y es código abierto (libre)
Juanjo Cristian

R, the Software, Finds Fans in Data Analysts - NYTimes.com - 0 views

www.nytimes.com/...07program.html

shared by Juanjo Cristian on 22 Apr 13 - No Cached
  • R describe it  as a supercharged version of  Microsoft’s Excel
  • R describe it  as a supercharged version of Microsoft’s Excel
  • R describe it  as a supercharged version of Microsoft’s Excel
  • ...26 more annotations...
  • R describe it  as a supercharged version of  Microsoft’s Excel
  • R describe it  as a supercharged version of
  • R describe it  as a supercharged version of  Microsoft’s Excel
  • R describe it  as a supercharged version of  Microsoft’s Excel
  • R describe it  as a supercharged version of  Microsoft’s Excel
  • is particularly useful because it contains a number of built-in mechanisms for organizing data, running calculations on the information and creating graphical representations of data sets.
  • familiar
  • familiar
  • It allows statisticians to do very intricate and complicated analyses without knowing the blood and guts of computing systems.”
  • It is also free.
  • R is an open-source program, and its popularity reflects a shift in the type of software used inside corporations
  • R describe it  as a supercharged version of Microsoft’s Excel
  • R is similar to other programming languages, like C, Java and Perl, in that it helps people perform a wide variety of computing tasks by giving them access to various commands.
  • Excel
  • Microsoft’s
  • version
  • supercharged
  • Some people familiar with R describe it
  • familiar
  • Mr. Gentleman is applying R-based software, called Bioconductor, in work he is doing on computational biology at the Fred Hutchinson Cancer Research Center in Seattle.
  • The popularity of R at universities could threaten SAS Institute, the privately held business software company that specializes in data analysis software. SAS, with more than $2 billion in annual revenue, has been the preferred tool of scholars and corporate managers.
  • Google, for example, taps R for help understanding trends in ad pricing and for illuminating patterns in the search data it collects.
  • Pfizer has created customized packages for R to let its scientists manipulate their own data during nonclinical drug studies rather than send the information off to a statistician.
  • R first appeared in 1996, when the statistics professors Ross Ihaka and Robert Gentleman of the University of Auckland in New Zealand released the code as a free software package.
    • Sébastien Sanchez
      Sébastien Sanchez on 25 Apr 13
       
      Artículo en NYTimes que habla de la creciente implantación del lenguaje de programación R en el ámbito empresarial. Explica como cada vez más, grandes empresas como Google empiezan a emplear este lenguaje de programación para todo tipo de propósitos (investigación comercial, data mining…).
    • Juanjo Cristian
      Juanjo Cristian on 01 May 13
       
      El lenguaje de programación R ha cautivado a gran parte de los analistas de datos debido a su potencial en el ámbito de la estadística especialmente. También es usado por grandes empresas como Google o Bank of America y por estadistas y científicos.
  • empresa 2013 on 22 Apr 13
     
    Se trata de un artículo del New York Times en el que describe la historia del lenguaje y diferentes empresas que lo utilizan y los usos que le dan, como Google y Pfizer.
Raúl Sarrión

R Language Definition - 1 views

cran.r-project.org/...R-lang.html

language definition R programming

shared by Raúl Sarrión on 22 Apr 13 - No Cached
  • R is a system for statistical computation and graphics. It provides, among other things, a programming language, high level graphics, interfaces to other languages and debugging facilities.
  • The R language is a dialect of S which was designed in the 1980s
  • Its principal designer,
  • ...11 more annotations...
  • was awarded the 1998 ACM Software Systems Award for S.
  • The language syntax has a superficial similarity with C, but the semantics are
  • variety with stronger affinities with Lisp and APL.
  • It is possible to get quite far using R interactively, executing simple expressions from the command line.
  • Some users may never need to go beyond that level
  • The design of the language contains a number of fine points and common pitfalls which may surprise the user.
  • In some cases, there are multiple ways of performing a task, but some of the techniques will rely on the language implementation, and others work at a higher level of abstraction. In such cases we shall indicate the preferred usage.
  • R does not provide direct access to the computer's memory but rather provides a number of specialized data structures we will refer to as objects.
  • In R, however, the symbols are themselves objects and can be manipulated in the same way as any other object. This is different from many other languages and has wide ranging effects.
  • This is an introduction to the R language, explaining evaluation, parsing, object oriented programming, computing on the language, and so forth.
    • Raúl Sarrión
      Raúl Sarrión on 22 Apr 13
       
      En esta pagina se entiende el lenguaje R como un dialecto de S. Este lenguaje R sirve tanto para programacion, como para crear graficas de alto nivel de dificultad... Tambien nos da una breve explicacion sobre algunos de los comandos usados para R tanto como parte de la gramatica del lenguaje mismo.
    • Raúl Sarrión
      Raúl Sarrión on 22 Apr 13
       
      hola
  • Raúl Sarrión on 22 Apr 13
     
    Una explicación mas extensa sobre el lenguaje R
David Moya

Carlos Riff Moya - 0 views

eric.univ-lyon2.fr/...cours_programmation_R.html

shared by David Moya on 24 Apr 13 - No Cached
    • David Moya
      David Moya on 24 Apr 13
       
      R es al mismo tiempo un programa y un lenguaje de programación, funciona por comandos, dispone de una biblioteca de estadísticas muy amplia y se le pueden añadir más por el sistema de "packages".
    • David Moya
      David Moya on 24 Apr 13
       
      Es un lenguaje objeto, su estructura de base es el vector. Lo que se pretende con este lenguaje es programar técnicas, estadísticas, analisis de datos y "data mining"
  • Il dispose d'une bibliothèque très large de fonctions statistiques
  • ...5 more annotations...
  • Il fonctionne sous la forme d'un interpréteur de commandes.
  • R est à la fois un logiciel de statistique et un langage de programmation.
  • 'il est possible d'en intégrer de nouvelles par le système des "packages"
  • c'est un langage objet, la structure de base est le vecteur, une bibliothèque très riche de fonctions permettant de manipuler ces structures sont disponibles.
  • la plupart des illustrations consisteront à programmer des techniques statistiques, d'analyse de données et de data mining.
juan trinidad jimenez armesto

Open Source R Language Undergoes a Commercial Revolution - Developer.com - Developer.com - 0 views

www.developer.com/...es-a-Commercial-Revolution.htm

shared by juan trinidad jimenez armesto on 29 Apr 13 - No Cached
    • Yes We Pass
      Yes We Pass on 09 May 13
       
      En esta página se señala dónde es necesario utiizar el lenguaje R (compañías que requieran recoger mucha información y analizarla). Se pone por ejemplo la empresa revolution Analytics, que se dedica a crear nuevas herramientas para los usuarios de este lenguaje de programación, en un intento de llegar a más gente y expandir su uso.
  • "Today, R is memory-bound and cannot handle large data sets," Smith said. "So we'll be bringing out in the near future a solution for handling massive datasets in the terabyte and petabyte range."
    • juan trinidad jimenez armesto
      juan trinidad jimenez armesto on 01 May 13
       
      Se espera de R, en un futuo, que sea capaz de manejas cantidades ingentes de datos, del orden de Terabytes y Petabytes
  • Revolution Analytics is also working on R usability. Smith noted that R, to date, has been a command-line-driven language, which has represented a challenge for some mainstream enterprise users."So we'll be rolling out a modern, flexible and extensible thin client user interface that can bridge the gap between expert users and the more casual business analysts," Smith said.
    • juan trinidad jimenez armesto
      juan trinidad jimenez armesto on 01 May 13
       
      Sin embargo, R no deja de ser un lenguaje de programación, ejecutado desde un terminal y se espera conseguir una interfaz más cercana al usuario común.
Alpha Teleco

Why R is Hard to Learn | (R news & tutorials) - 0 views

www.r-bloggers.com/why-r-is-hard-to-learn

shared by Alpha Teleco on 29 Apr 13 - No Cached
  • Misleading Function or Parameter Names (data=, sort, if)
  • The most difficult time people have learning R is when functions don’t do the “obvious” thing.
  • Nonstandard Output
  • ...9 more annotations...
  • Too Many Commands
  • Sloppy Control of Variables
  • Loop-a-phobia
  • Functions That Act Like Procedures
  • Naming and Renaming Variables is Way Too Complicated
  • Inability to Analyze Multiple Variables
  • Poor Ability to Select Variable Sets
  • Too Much Complexity
  • Lack of Graphical User Interface (GUI)
nerub val

R Programming/Introduction - Wikibooks, open books for an open world - 1 views

en.wikibooks.org/...Introduction

shared by nerub val on 24 Apr 13 - Cached
  • R is statistical software which is used for data analysis.
  • It includes a huge number of statistical procedures such as t-test, chi-square tests, standard linear models, instrumental variables estimation, local polynomial regressions, etc. It also provides high-level graphics
  • capabilities
  • ...14 more annotations...
  • R is an object oriented programming language. This means that virtually everything can be stored as an R object. Each object has a class. This class describes what the object contains and what each function does with it. For instance, plot(x) produces different outputs depending on whether x is a regression object or a vecto
  • The assignment symbol is "<-". Alternatively, the classical "=" symbol can be used.
  • Arguments are passed to functions inside round brackets (parentheses). One can easily combine functions. For instance you can directly type
  • The symbol "#" comments to the end of the line:
  • Commands are normally separated by a newline. If you want to put more than one statement on a line, you can use the ";" delimiter.
  • You can also have one statement on multiple lines. R is case sensitive: a and A are two different objects. Traditionally underscores "_" are not used in names. It is often better to use dots ".". One should avoid using an underscore as the first character of an object name.
  • Here are some things editors do to keep this book internally consistent. If you have something to contribute, go ahead and make your contribution. Other editors can touch up your edits afterwards so that they conform to the guidelines.
  • The local manual of style WB:LMOS for the R programming book, including a brief explanation of why we do it that way, is: Examples use "source" tags : <source lang="rsplus"> a <- 1:10 ; mean(a) </source>. That makes them look pretty to our readers. The name of packages are in bold  : '''Hmisc'''. Name of functions are in "code" tags: <code>lm()</code>. Page titles -- the part after "R Programming/" -- are in sentence case, like "R Programming/Working with data frames". We couldn't decide between sentence case and title case, so I flipped a coin. Every page has <noinclude>{{R Programming/Navigation}}</noinclude> at the top and {{R Programming/Navbar|Mathematics|Probability Distributions}} at the bottom. That makes it easier to navigate from one page to another online.
    • nerub val
      nerub val on 24 Apr 13
       
      La lenguaje R es un software de estatisticas que hace analisis de los datos.
    • nerub val
      nerub val on 24 Apr 13
       
      Las ventajas de la lenguaje R
    • nerub val
      nerub val on 24 Apr 13
       
      las caracteristicas de la lenguaje R
    • nerub val
      nerub val on 24 Apr 13
       
      Cómo podemos empezar a hacer un programa con esa lenguaje?
    • nerub val
      nerub val on 24 Apr 13
       
      Aqui se exponen otras alternativas al lenguaje R. Y aconseja en la ultima parte cuales son los recomendados para cada nivel de dominio del lenguaje R
  • Beginners can have a look at GNU PSPP or Gretl. Intermediate users can check out Stata. Advanced users who like matrix programming may prefer MATLAB or Octave. Very advanced users may use C or Fortran.
Enrique Diaz Romero

An Introduction to R - 1 views

stat.ethz.ch/...R-intro.html

shared by Enrique Diaz Romero on 24 Apr 13 - No Cached
    • nerub val
      nerub val on 24 Apr 13
       
      las carateristicas generales de R
    • nerub val
      nerub val on 24 Apr 13
       
      El desarrollo de R
  • R is an integrated suite of software facilities for data manipulation, calculation and graphical display. Among other things it has 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 directly at the computer or on hardcopy, and a well developed, simple and effective programming language (called ‘S’) which includes conditionals, loops, user defined recursive functions and input and output facilities. (Indeed most of the system supplied functions are themselves written in the S language.)
    • Enrique Diaz Romero
      Enrique Diaz Romero on 25 Jun 13
       
      El entorno de R entre otras cosas nos permite el uso y almacenamiento eficaz de datos, así como su análisis en forma de matrices, un gran numero de herramientas graficas y un lenguaje claro y sencillo de programación en el que podemos encontrar un gran numero de funciones.
  • ...4 more annotations...
  • his section presumes the reader has some familiarity with statistical methodology, in particular with regression analysis and the analysis of variance. Later we make some rather more ambitious presumptions, namely that something is known about generalized linear models and nonlinear regression. The requirements for fitting statistical models are sufficiently well defined to make it possible to construct general tools that apply in a broad spectrum of problems. R provides an interlocking suite of facilities that make fitting statistical models very simple. As we mention in the introduction, the basic output is minimal, and one needs to ask for the details by calling extractor functions.
  • When you use the R program it issues a prompt when it expects input commands. The default prompt is ‘>’, which on UNIX might be the same as the shell prompt, and so it may appear that nothing is happening. However, as we shall see, it is easy to change to a different R prompt if you wish. We will assume that the UNIX shell prompt is ‘$’.
  • R can be regarded as an implementation of the S language which was developed at Bell Laboratories by Rick Becker, John Chambers and Allan Wilks, and also forms the basis of the S-Plus systems. The evolution of the S language is characterized by four books by John Chambers and coauthors. For R, the basic reference is The New S Language: A Programming Environment for Data Analysis and Graphics by Richard A. Becker, John M. Chambers and Allan R. Wilks. The new features of the 1991 release of S are covered in Statistical Models in S edited by John M. Chambers and Trevor J. Hastie. The formal methods and classes of the methods package are based on those described in Programming with Data by John M. Chambers. See References, for precise references. There are now a number of books which describe how to use R for data analysis and statistics, and documentation for S/S-Plus can typically be used with R, keeping the differences between the S implementations in mind. See What documentation exists for R?.
  • R (“GNU S”), a language and environment for statistical computing and graphics. R is similar to the award-winning1 S system, which was developed at Bell Laboratories by John Chambers et al. It provides a wide variety of statistical and graphical techniques
    • Enrique Diaz Romero
      Enrique Diaz Romero on 25 Jun 13
       
      ¿Que es R y de donde viene? R nos lo presentan como un lenguaje y entorno que desciende del reconocido sistema S desarrollado por los laboratorios Bell, y que nos ofrece una serie de técnicas u herramientas para el análisis estadístico y gráfico
  • Enrique Diaz Romero on 25 Jun 13
     
    Introducción completa al lenguaje R de programación para análisis de datos estadísticos.
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