getCoeffFun {qAnalyst}R Documentation

Internal wrapper function to getParameterFun

Description

getCoeffFun returns the parameters from Montgomery book A6 coefficients table. Coefficients from A6 table are used in control charts construction.

Usage

getCoeffFun(sampleSize, coeff)

Arguments

sampleSize

A vector of subgroups size.

coeff

a string that specifies the required parameters.

Details

Internal function

Value

A vector of coefficients.

Note

getCoeffFun is a wrapper for getParameter. getCoeffFun handles missing values, returning NA if subgroup dimension is NA.

Author(s)

Giorgio Spedicato and Andrea Spano'

References

Montgomery, Statistical Quality Control

See Also

getParameterFun

Examples

##Simple example
sgDim=c(10,5,8,10)
getCoeffFun(sgDim,"d3")
# 0.797 0.864 0.820 0.797

[Package qAnalyst version 0.6.4 Index]