UN_dispersion_robust_sMAD: sMAD of a matrix

In polgia0/Chemometricmenus: Chemometric package

Description

Median Absolute Deviation (MAD) of a matrix by rows or columns

Usage

UN_dispersion_robust_sMAD(previous.name = "")

Arguments

previous.name

name of the default name in the menu

Details

• Allcalculation made on the whole matrix

• Row wisecalculation made by rows

MAD is based on the median taken as central value of the sample distribution; the absolute differences are computed and MAD is defined as the median of such differences. In the case of a normal distribution, MAD times 1.483 can be used for a robust estimation of the theoretical standard deviation.

Value

The output is saved in the variable var.dispersion

All	single numeric value
Row wise	numeric vector
Column wise	numeric vector

Author(s)

Riccardo Leardi and Gianmarco Polotti with contributions from Giorgio Marubini.Gruppo di Chemiometria (Divisione di Chimica Analitica della Societa' Chimica Italiana)

Examples

A<-matrix(1:20,5,4)
UN_dispersion_robust_sMAD('A')

polgia0/Chemometricmenus documentation built on May 28, 2019, 12:03 p.m.