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R is an elegant and comprehensive statistical and graphical programming language. Unfortunately, it can also have a steep learning curve. I created this website for both current R users, and experienced users of other statistical packages (e.g., SAS, SPSS, Stata) who would like to transition to R. My goal is to help you quickly access this language in your work.

I assume that you are already familiar with the statistical methods covered and instead provide you with a roadmap and the code necessary to get started quickly, and orient yourself for future learning. I designed this web site to be an easily accessible reference. Look at the sitemap to get an overview.

If you prefer an online interactive environment to learn R, this free R tutorial by DataCamp is a great way to get started. If you're already somewhat advanced and interested in machine learning, try this Kaggle tutorial on who survived the Titanic.

What's New

A link to the new resource The R Graph Gallery has been added.
A number of new sections have been added. These include:

• A new section on time series analysis.
• A new section on ggplot2 graphics.
• For old friends, please note that I've renamed the section on trellis graphs to lattice graphs. Since both the lattice and ggplot2 packages can be used to create trellis graphs, changing the name makes the distinction between these two sections clearer.

Why Use R?

If you currently use another statistical package, why learn R?

1. It's free! If you are a teacher or a student, the benefits are obvious.
2. It runs on a variety of platforms including Windows, Unix and MacOS.
3. It provides an unparalleled platform for programming new statistical methods in an easy and straightforward manner.
4. It contains advanced statistical routines not yet available in other packages.
5. It has state-of-the-art graphics capabilities.

Obtaining R

R is available for Linux, MacOS, and Windows (95 or later) platforms. Software can be downloaded from one of the Comprehensive R Archive Network (CRAN) mirror sites.

Feedback

I constantly strive to improve these pages. Feedback and suggestions are always welcome!
- Rob Kabacoff

Also found in: Thesaurus, Medical, Legal, Financial, Acronyms, Idioms, Encyclopedia, Wikipedia.

R ¹

(är)

R ²

R ³

abbr.

r ¹

or R(är)n.pl.r's or R's also rs or Rs

r ²

abbr.

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R

n, plr's, R'sorRs

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symbol for2. (Currencies) currency9. (Film) (in the US and Australia)

R, r

(ɑr)
n., pl. RsR's, rsr's.

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Symbol.

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r

Noun	1.	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
2.	R - (physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole gas constant, universal gas constant natural philosophy, physics - the science of matter and energy and their interactions; 'his favorite subject was physics' constant - a number representing a quantity assumed to have a fixed value in a specified mathematical context; 'the velocity of light is a constant'
3.	r - the 18th letter of the Roman alphabet Latin alphabet, Roman alphabet - the alphabet evolved by the ancient Romans which serves for writing most of the languages of western Europe alphabetic character, letter of the alphabet, letter - the conventional characters of the alphabet used to represent speech; 'his grandmother taught him his letters'
4.	r - the length of a line segment between the center and circumference of a circle or sphere diam, diameter - the length of a straight line passing through the center of a circle and connecting two points on the circumference semidiameter - the apparent radius of a celestial body when viewed as a disc from the earth radius of curvature - the radius of the circle of curvature; the absolute value of the reciprocal of the curvature of a curve at a given point length - the linear extent in space from one end to the other; the longest dimension of something that is fixed in place; 'the length of the table was 5 feet'

R

¹r¹[ɑːʳ]N (= letter) → R, r f
R for Robert

R/gachalifecringe

→ R de Ramón
the three Rs (= reading, writing and arithmetic) lectura, escritura y aritméticaTHREE RS

R

²r²A.ABBR

R Words

R

r[ˈɑː^r]n (= letter) → R, r m
R for Robert, R for Roger (US) → R comme Raoul

R

[ˈɑː^r]abbr

R

, r

R

r

abbr ofright → r.

R

r[ɑːʳ]n (letter) → R, r f or m inv
the three Rs → leggere, scrivere e far di conto
R for Robert (Am) R for Roger → R come Roma
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