coef is a generic function which extracts the leading coefficients of the model of a process region; the coefficients are extracted from the object of class
object of a class
other arguments, currently not used.
Shape of the process region is mainly defined by the leading coefficients of the process models (here one-sided models ale applied). To keep a similar shape of the process region in the future process analysis, minimal values of the leading coefficients are required. This function allows to extract the leading coefficients from the
A matrix with 2 rows (named
coef.up) and number of columns corresponding the number of variables.
For the viariable used as the independent one in the
mpcv function the
NA value is returned.
<krzysztof.ciupke at polsl.pl>
Ciupke K. (2014) Multivariate Process Capability Vector Based on One-Sided Model, Quality and Reliability Engineering International, John Wiley & Sons.
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