residuals.gam: Generalized Additive Model residuals
Description
Returns residuals for a fitted gam model
object. Pearson, deviance, working and response residuals are
available.Usage
residuals.gam(object, type = c("deviance", "pearson", "working", "response"),...)Arguments
object
a gam fitted model object.
type
the type of residuals wanted.
Details
Response residuals are the raw residuals (data minus fitted
values). Pearson residuals are raw residuals divided by the standard
deviation of the data according to the model mean variance
relationship ($(y-\mu)/\sqrt{V(\mu)}$, where
$y$ is data $\mu$ is model fitted value and $V$
is model mean-variance relationship.). Deviance residuals simply
return the deviance residuals defined by the model family. Working
residuals are the residuals returned from model fitting at convergence. There is a special function for gam objects because of a bug
in the calculation of Pearson residuals in some versions of
residual.glm().