lambda: Find the box-cox transform exponent estimate

In BillVenables/WWRUtilities: Support Software and Data for WWR

Description

Estimates the box-cox power transformation appropriate for a linear model

Usage

lambda(bc, ...)

## S3 method for class 'formula'
lambda(bc, data = sys.parent(), ..., span = 5)

## S3 method for class 'lm'
lambda(bc, ..., span = 5)

## S3 method for class 'box_cox'
lambda(bc, ..., span = 5)

## Default S3 method:
lambda(bc, ...)

Arguments

bc	either a "box_cox" object, a formula,data pair, a linear model object or an xy-lixt
...	additional parameters passed on to box_cox
data	a data frame or envinonment
span	integer: how many steps on either side of the maximum to use for the quadratic interpolation to find the maximum

Value

numeric: the maximum likelihood estimate of the exponent

Examples

lambda(medv ~ ., Boston, span = 10)

BillVenables/WWRUtilities documentation built on Jan. 26, 2021, 10:18 p.m.