Fit linear models by Generalized Least Squares
lm.gls(formula, data, W, subset, na.action, inverse = FALSE,
method = "qr", model = FALSE, x = FALSE, y = FALSE,
contrasts = NULL, …)a formula expression as for regression models, of the form
response ~ predictors.
See the documentation of formula for other details.
an optional data frame, list or environment in which to interpret the
variables occurring in formula.
a weight matrix.
expression saying which subset of the rows of the data should be used in the fit. All observations are included by default.
a function to filter missing data.
logical: if true W specifies the inverse of the weight matrix: this
is appropriate if a variance matrix is used.
method to be used by lm.fit.
should the model frame be returned?
should the design matrix be returned?
should the response be returned?
a list of contrasts to be used for some or all of
additional arguments to lm.fit.
An object of class "lm.gls", which is similar to an "lm"
object. There is no "weights" component, and only a few "lm"
methods will work correctly. As from version 7.1-22 the residuals and
fitted values refer to the untransformed problem.
The problem is transformed to uncorrelated form and passed to
lm.fit.