residuals.gls {nlme}  R Documentation 
Extract gls Residuals
Description
The residuals for the linear model represented by object
are extracted.
Usage
## S3 method for class 'gls'
residuals(object, type, ...)
Arguments
object 
an object inheriting from class "gls" , representing
a generalized least squares fitted linear model, or from class
gnls , representing a generalized nonlinear least squares
fitted linear model.

type 
an optional character string specifying the type of
residuals to be used. If "response" , the "raw" residuals
(observed  fitted) are used; else, if "pearson" , the
standardized residuals (raw residuals divided by the corresponding
standard errors) are used; else, if "normalized" , the
normalized residuals (standardized residuals premultiplied by the
inverse squareroot factor of the estimated error correlation
matrix) are used. Partial matching of arguments is used, so only the
first character needs to be provided. Defaults to "response" .

... 
some methods for this generic function require additional
arguments. None are used in this method.

Value
a vector with the residuals for the linear model represented by
object
.
Author(s)
JosÃ© Pinheiro and Douglas Bates bates@stat.wisc.edu
See Also
gls
Examples
fm1 < gls(follicles ~ sin(2*pi*Time) + cos(2*pi*Time), Ovary,
correlation = corAR1(form = ~ 1  Mare))
residuals(fm1)
[Package
nlme version 3.1139
Index]