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R is a programming language for statistical computing and data visualization. It has been adopted in the fields of data mining, bioinformatics and data analysis. [9] The core R language is augmented by a large number of extension packages, containing reusable code, documentation, and sample data. R software is open-source and free software.
R logo. R packages are extensions to the R statistical programming language.R packages contain code, data, and documentation in a standardised collection format that can be installed by users of R, typically via a centralised software repository such as CRAN (the Comprehensive R Archive Network).
The six factors of an effective verbal communication. Each corresponds to a communication function (not displayed in this picture). [1] Roman Jakobson defined six functions of language (or communication functions), according to which an effective act of verbal communication can be described. [2] Each of the functions has an associated factor.
The image of a function f(x 1, x 2, …, x n) is the set of all values of f when the n-tuple (x 1, x 2, …, x n) runs in the whole domain of f.For a continuous (see below for a definition) real-valued function which has a connected domain, the image is either an interval or a single value.
In mathematics, a function from a set X to a set Y assigns to each element of X exactly one element of Y. [1] The set X is called the domain of the function [2] and the set Y is called the codomain of the function. [3] Functions were originally the idealization of how a varying quantity depends on another quantity.
The set of all functions f: X → X is called the full transformation semigroup [6] or symmetric semigroup [7] on X. (One can actually define two semigroups depending how one defines the semigroup operation as the left or right composition of functions. [8]) Composition of a shear mapping (red) and a clockwise rotation by 45° (green). On the ...
Influenced by the Organon-Model by Karl Bühler, Jakobson distinguishes six communication functions, each associated with a dimension or factor of the communication process [n.b. – Elements from Bühler's theory appear in the diagram below in yellow and pink, Jakobson's elaborations in blue]:
A real-valued function of a real variable is a function that takes as input a real number, commonly represented by the variable x, for producing another real number, the value of the function, commonly denoted f(x). For simplicity, in this article a real-valued function of a real variable will be simply called a function. To avoid any ambiguity ...