- Data matrix (multivariate statistics)
In multivariate statistics, a data matrix is a mathematical matrix of data whose rows represent different repetition of an experiment, and whose columns represent different types of datum (say, the results from a particular probe). For example, suppose an experiment is run where 10 people are pulled off the street and asked four questions. The data matrix M would be a 10x4 matrix. The datum in row i and column j of this matrix would be the answer of the i-th person to the j-th question.
Wikimedia Foundation. 2010.
Look at other dictionaries:
Data matrix — can refer to: Matrix (mathematics) A rectangular array of elements Data matrix (computer) An encoded barcode. Data set A collection of data in tabular form. Data matrix (multivariate statistics) A mathematical matrix of data whose rows represent… … Wikipedia
Multivariate analysis of variance — (MANOVA) is a generalized form of univariate analysis of variance (ANOVA). It is used when there are two or more dependent variables. It helps to answer : 1. do changes in the independent variable(s) have significant effects on the dependent … Wikipedia
Multivariate kernel density estimation — Kernel density estimation is a nonparametric technique for density estimation i.e., estimation of probability density functions, which is one of the fundamental questions in statistics. It can be viewed as a generalisation of histogram density… … Wikipedia
Multivariate normal distribution — MVN redirects here. For the airport with that IATA code, see Mount Vernon Airport. Probability density function Many samples from a multivariate (bivariate) Gaussian distribution centered at (1,3) with a standard deviation of 3 in roughly the… … Wikipedia
Multivariate random variable — In mathematics, probability, and statistics, a multivariate random variable or random vector is a list of mathematical variables each of whose values is unknown, either because the value has not yet occurred or because there is imperfect… … Wikipedia
Multivariate Verfahren — In der multivariaten Statistik werden mit Hilfe von Multivariaten Verfahren (auch: Multivariate Analysemethoden) mehrere statistische Variablen oder Zufallsvariablen zugleich untersucht. Zum Beispiel können für Fahrzeuge die Variablen Anzahl der… … Deutsch Wikipedia
Multivariate adaptive regression splines — (MARS) is a form of regression analysis introduced by Jerome Friedman in 1991. It is a non parametric regression technique and can be seen as an extension of linear models that automatically models non linearities and interactions. The term… … Wikipedia
Data transformation (statistics) — A scatterplot in which the areas of the sovereign states and dependent territories in the world are plotted on the vertical axis against their populations on the horizontal axis. The upper plot uses raw data. In the lower plot, both the area and… … Wikipedia
Matrix (mathematics) — Specific elements of a matrix are often denoted by a variable with two subscripts. For instance, a2,1 represents the element at the second row and first column of a matrix A. In mathematics, a matrix (plural matrices, or less commonly matrixes)… … Wikipedia
Data mining — Not to be confused with analytics, information extraction, or data analysis. Data mining (the analysis step of the knowledge discovery in databases process, or KDD), a relatively young and interdisciplinary field of computer science is… … Wikipedia