qualityTools (version 1.31.1)

fits-methods: Get and set methods

Description

Set or get the fits (i.e. linear model) for each response of a factorial design. The fit is stored in the facDesign object. Setting fits is required for optimization of multiple responses.

Usage

## S3 method for class 'facDesign':
fits(x)
## S3 method for class 'facDesign':
fits(x) <- value

Arguments

x

an object of class facDesign

value

an object of class lm

See Also

desires, desirability rsmDesign

Examples

#create response surface design
fdo = rsmDesign(k = 2, blocks = 2, alpha = "both")

#set two responses for the response surface designs
response(fdo) = data.frame(y= rnorm(14, 12, sd =  2), y2 =  -2*fdo[,4]^2 - fdo[,5]^2 + rnorm(14, 12))

#set a fit for each response
fits(fdo) = lm(y ~ A*B , data = fdo)
fits(fdo) = lm(y2 ~ A*B + I(A^2) + I(B^2), data = fdo)

#get the fitted response for y2
fits(fdo)[["y2"]]