# correlation

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**Correlation function**— For other uses, see Correlation function (disambiguation). A correlation function is the correlation between random variables at two different points in space or time, usually as a function of the spatial or temporal distance between the points.… …82

**correlation coefficient**— noun a statistic representing how closely two variables co vary; it can vary from 1 (perfect negative correlation) through 0 (no correlation) to +1 (perfect positive correlation) what is the correlation between those two variables? • Syn:… …83

**Correlation database**— A Correlation database is a database management system (DBMS) that is data model independent and designed to efficiently handle unplanned, ad hoc queries in an analytical system environment. It was developed in 2005 by database architect Joseph… …84

**Correlation function (statistical mechanics)**— For other uses, see Correlation function (disambiguation). In statistical mechanics, the correlation function is a measure of the order in a system, as characterized by a mathematical correlation function, and describes how microscopic variables… …85

**Corrélation électronique**— L expression de corrélation électronique est utilisée pour décrire l interaction entre électrons dans un système quantique, dont on considère la structure électronique. Le terme de corrélation provient des mathématiques statistiques et indique… …86

**Correlation clustering**— In machine learning, correlation clustering or cluster editing operates in a scenario where the relationship between the objects are known instead of the actual representation of the objects. For example, given a signed graph G = (V,E) where the… …87

**Correlation ratio**— In statistics, the correlation ratio is a measure of the relationship between the statistical dispersion within individual categories and the dispersion across the whole population or sample. The measure is defined as the ratio of two standard… …88

**Correlation immunity**— In mathematics, the correlation immunity of a Boolean function is a measure of the degree to which its outputs are uncorrelated with some subset of its inputs. Specifically, a Boolean function is said to be correlation immune of order m if every… …89

**Correlation swap**— A correlation swap is an over the counter financial derivative that allows one to speculate on or hedge risks associated with the observed average correlation, of a collection of underlying products, where each product has periodically observable …90

**Correlation dimension**— In chaos theory, the correlation dimension (denoted by ν) is a measure of the dimensionality of the space occupied by a set of random points, often referred to as a type of fractal dimension.[1][2][3] For example, if we have a set of random… …