stats: Auxiliary statistics for the multivariate control chart.

In IQCC: Improved Quality Control Charts

Description

This function calculate the auxiliary statistics necessary to build the control chart reference lines.

Usage

stats(datum, m, n, p)

Arguments

datum	The data set. Should be an array.
m	The number of sub groups generated previously in data.1.
n	The size of each sub group used previously in data.1.
p	The dimension used previously in function data.1.

Details

To use this function it is necessary to have the information about the data.1.

Value

Return the values of the three statistics: a vector with the mean of the means, the mean of the estimated variance-covariance matrixes and a matrix with the means of each sample.

Author(s)

Daniela R. Recchia, Emanuel P. Barbosa

Examples

mu <- c(5.682, 88.22)
Sigma <- symMatrix(c(3.770, -5.495, 13.53), 2)
#Example with individual observations
datum <- data.1(50, 1, mu, Sigma)
estat <- stats(datum, 50, 1, 2)
#Example with sub-group observations
datum <- data.1(20, 10, mu, Sigma)
estat <- stats(datum, 20, 10, 2)

IQCC documentation built on May 1, 2019, 10:58 p.m.