The residuals for the linear model represented by object
# S3 method for gls
residuals(object, type, …)
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.
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".
some methods for this generic function require additional
arguments. None are used in this method.
a vector with the residuals for the linear model represented by