mqcs.t2: Function to plot t2 Hotelling chart

In mflores72000/qcr: Quality Control Review

Function to plot t2 Hotelling chart

Description

This function is used to compute statistics required by the t2 of HOTELLING or Shewhart Multivariate chart.

Usage

mqcs.t2(x, ...)

## Default S3 method:
mqcs.t2(
  x,
  data.name = NULL,
  limits = NULL,
  Xmv = NULL,
  S = NULL,
  colm = NULL,
  alpha = 0.01,
  phase = 1,
  method = "sw",
  plot = FALSE,
  ...
)

## S3 method for class 'mqcd'
mqcs.t2(
  x,
  limits = NULL,
  Xmv = NULL,
  S = NULL,
  colm = NULL,
  alpha = 0.01,
  phase = 1,
  method = "sw",
  plot = FALSE,
  ...
)

Arguments

x	An object of class 'mqcd'
...	Arguments passed to or from methods.
data.name	A string that specifies the title displayed on the plots. If not provided it is taken from the name of the object x.
limits	A two-values vector specifying the control limits.
Xmv	The mean vector. It is only specified for Phase II or when the parameters of the distribution are known.
S	The sample covariance matrix. It is only used for Phase II or when the parameters of the distribution are known.
colm	The number of samples (m) and it is only used in Hotelling control chart for Phase II.
alpha	It is the the significance level (0.01 for default)
phase	Allows to select the type of UCL to use. Only values of phase = 1 or 2 are allowed.
method	The method employed to compute the covariance matrix in the individual observation case. Two methods are used "sw" for compute according to (Sullivan,Woodall 1996a) and "hm" by (Holmes,Mergen 1993)
plot	Logical value. If TRUE a t2 chart should be plotted.

Author(s)

Edgar Santos-Fernandez

See Also

mqcd, mqcs

Examples

##
##  Continuous data 
##
library(qcr)
data(dowel1)
str(dowel1)
data.mqcd <- mqcd(dowel1)
res.mqcs <- mqcs.t2(data.mqcd)
summary(res.mqcs)
plot(res.mqcs, title =" Hotelling Control Chart for dowel1")

data(archery1)
str(archery1)
data.mqcd <- mqcd(archery1)
res.mqcs <- mqcs.t2(data.mqcd)
summary(res.mqcs)
plot(res.mqcs, title =" Hotelling Control Chart for archery1")

mflores72000/qcr documentation built on July 1, 2023, 9:17 p.m.