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
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]