Univariate

In mathematics, univariate refers to an expression, equation, function or polynomial of only one variable. Objects of any of these types but involving more than one variable may be called multivariate. In some cases the distinction between the univariate and multivariate cases is fundamental; for instance the study of roots of a polynomial only has a meaning in the univariate case.

The term is commonly used in statistics to distinguish a distribution of one variable from a distribution of several variables, although it can be applied in other ways as well. For example, univariate data are composed of a single scalar component. In time series analysis, the term is applied with a whole time series as the object referred to: thus a univariate time series refers to the set of values over time of a single quantity. Correspondingly, a "multivariate time series" refers to the changing values over time of several quantities. Thus there is a minor conflict of terminology since the values within a univariate time series may be treated using certain types of multivariate statistical analyses and may be represented using multivariate distributions.

Other articles related to "univariate":

Monic Polynomial - Univariate Polynomials
... If a polynomial has only one variable (univariate polynomial), then the terms are usually written either from highest degree to lowest degree ("descending powers") or from lowest degree to ... A univariate polynomial in x of degree n then takes the general form displayed above, where cn ≠ 0, cn−1.. ... leading term, and its coefficient cn the leading coefficient if the leading coefficient is 1, the univariate polynomial is called monic ...
Multivariate Median
... Previously, this article discussed the concept of a univariate median for a one-dimensional object (population, sample) ... multiple concepts that extend the definition of the univariate median each such multivariate median agrees with the univariate median when the dimension is exactly one ...
Univariate Distribution
... In statistics, a univariate distribution is a probability distribution of only one random variable ... At least 750 univariate discrete distributions have been reported in the literature ...
S. N. Roy - Selected Ph.D. Dissertations Under Roy's Guidance
... to multivariate analysis including univariate and multivariate variance components analysis and factor analysis" ... "Studies in univariate and multivariate variance components analysis connected with sampling from a finite population" ... "Some contributions to the theory of univariate and multivariate statistical analysis" ...