The residuals for the linear model represented by
object
are extracted.
USAGE:
residuals(object, type)
REQUIRED ARGUMENTS:
object
an object inheriting from class
gnls, representing
a generalized 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 pre-multiplied by the
inverse square-root 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".
VALUE:
a vector with the residuals for the linear model represented by
object
.