getcdfupdates {spcadjust}

CDF of Updates of a Control Chart

Description

Consider running a control chart with given parameters with data coming from a given probability model. This function computes the cumulative distribution function (CDF) of the updates of the control charts as they would be computed by the method updates.

Usage

getcdfupdates(chart, P, xi)

## S4 method for signature 'SPCchart'
getcdfupdates(chart, P, xi)

## S4 method for signature 'SPCShew'
getcdfupdates(chart, P, xi)

Arguments

chart

the chart to be used.

P

the probability model from which data is generated.

xi

the parameters of the control chart.

Value

A function mapping one-dimensional numerical values into the interval [0,1], having all properties of a cumulative distribution function.

Methods (by class)

• SPCchart: Standard method which simply first applies getcdfresiduals from the data model.

• SPCShew: Computes the CDF of the updates taking into account if the chart is one-sided or two-sided.