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%\alias{print.infl}
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%\alias{print.infl}
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%\alias{summary.infl} <- To document: has 'digits' & return()s
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%\alias{summary.infl} <- To document: has 'digits' & return()s
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\alias{hat}
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\alias{hat}
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\alias{hatvalues}
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\alias{hatvalues}
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\alias{hatvalues.lm}
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\alias{hatvalues.lm}
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\alias{hatvalues.nls}
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\alias{rstandard}
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\alias{rstandard}
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\alias{rstandard.lm}
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\alias{rstandard.lm}
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\alias{rstandard.glm}
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\alias{rstandard.glm}
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\alias{rstudent}
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\alias{rstudent}
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\alias{rstudent.lm}
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\alias{rstudent.lm}
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               dispersion = summary(model)$dispersion,
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               dispersion = summary(model)$dispersion,
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               hat = infl$hat, \dots)
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               hat = infl$hat, \dots)
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hatvalues(model, \dots)
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hatvalues(model, \dots)
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\method{hatvalues}{lm}(model, infl = lm.influence(model, do.coef = FALSE), \dots)
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\method{hatvalues}{lm}(model, infl = lm.influence(model, do.coef = FALSE), \dots)
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\method{hatvalues}{nls}(model, \dots)% ../R/nls.R %
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hat(x, intercept = TRUE)
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hat(x, intercept = TRUE)
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}
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}
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\arguments{
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\arguments{
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  \item{model}{an \R object, typically returned by \code{\link{lm}} or
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  \item{model}{an \R object, typically returned by \code{\link{lm}} or
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  For \code{hatvalues}, \code{dfbeta}, and \code{dfbetas}, the method
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  For \code{hatvalues}, \code{dfbeta}, and \code{dfbetas}, the method
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  for linear models also works for generalized linear models. These were
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  for linear models also works for generalized linear models. These were
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  updated for R 4.6 to use \emph{working} residuals and weights; it is
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  updated for R 4.6 to use \emph{working} residuals and weights; it is
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  assumed that the model has methods suitable for
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  assumed that the model has methods suitable for
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  \code{\link{weighted.residuals}()}.
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  \code{\link{weighted.residuals}()}.
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  The \code{\link{nls}} method for \code{hatvalues()} is based on theory in
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  \bibcitet{R:StLaurent+Cook:1992}.
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}
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}
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\author{
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\author{
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  Several R Core Team members and John Fox, originally in his \CRANpkg{car}
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  Several R Core Team members and John Fox, originally in his \CRANpkg{car}
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  package.
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  package; \code{hatvalues.nls} by R Dev Day participants, see \PR{18897}.
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}
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}
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\references{
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\references{
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  \bibshow{*,
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  \bibshow{*,
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    R:Fox:2000,
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    R:Fox:2000,
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    R:Fox:2002,
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    R:Fox:2002,