fitted.regr: Fitted Values for regr and polr objects

In regr0: Building regression models

Description

fitted.regr extracts fitted values from regr objects. The function is needed for results of survival models, including Tobit models. fitted.polr calculates Fitted Values for ordered response regression. In addition to the types of the usual version, this function allows for extracting the link type of predictions.

Usage

## S3 method for class 'regr'
fitted(object, type = NULL, ...)
## S3 method for class 'polr'
fitted(object, type = "link", na.action = object, ...)

Arguments

object	an object of class regr (for fitted.regr), or one that inherits from class polr (for fitted.polr)
type	type of fitted values (as with predict). link asks for the linear predictor, class returns the most likely (integer) Y values probs returns probabilities for each value of Y
na.action	object that possibly contains an na.action component. If it is of the class exclude, the fitted values will be expanded to fit the number of rows in the data.frame used for fitting the regression.
...	further arguments, passed to fitted methods called by fitted.regr; not used in fitted.polr

Value

Vector (or matrix) of fitted values

Author(s)

Werner A. Stahel, Seminar for Statistics, ETH Zurich

Examples

data(housing, package="MASS") 
house.plr <- MASS::polr(Sat ~ Infl + Type + Cont, weights = Freq,
  data = housing)
house.fit <- fitted(house.plr, type="link") # only possible with regr version
summary( house.fit )

regr0 documentation built on May 2, 2019, 4:52 p.m.