\name{effects-package}
\Rdversion{1.1}
\alias{effects-package}
\alias{effects}
\docType{package}
\title{
Effect Displays for Linear, Generalized Linear, and Other Models
}
\description{
Graphical and tabular effect displays, e.g., of interactions, for linear (including fit via \code{\link[nlme]{gls}}), multivariate-linear, 
generalized linear, multinomial-logit, proportional-odds logit,
mixed-effect, polytomous latent-class, and some other models; (multidimensional) component+residual plots for linear and generalized linear models.
}
\details{
\tabular{ll}{
Package: \tab effects\cr
Version: \tab 3.0-5\cr
Date: \tab 2015/12/13\cr
Suggests: \tab pbkrtest (>= 0.4-4), nlme, MASS, poLCA, heplots, splines\cr
Imports: \tab lme4, nnet, lattice, grid, colorspace, graphics, grDevices, stats, utils\cr
LazyLoad: \tab yes\cr
LazyData: \tab yes\cr
License: \tab GPL (>= 2)\cr
URL: \tab http://www.r-project.org, http://socserv.socsci.mcmaster.ca/jfox/\cr
}

This package creates effect displays for various kinds of models, as partly explained in the references.
Typical usage is \code{plot(allEffects(model))},
where \code{model} is an appropriate fitted-model object.
Additional arguments to \code{allEffects} and \code{plot} can be used to customize the resulting
displays. The function \code{effect} can be employed to produce an effect display for a 
particular term in the model, or to which terms in the model are marginal. The function \code{Effect}
may similarly be used to produce an effect display for any combination of predictors. For linear and
generalized linear models it is also possible to plot partial residuals to obtain (multidimensional)
component+residual plots.
See \code{?effect}, \code{?Effect}, and \code{?plot.eff} for details.
}

\author{
John Fox <jfox@mcmaster.ca>, Sanford Weisberg, Michael Friendly, and Jangman Hong. 
We are grateful to Robert Andersen, David Firth, and for various suggestions.

Maintainer: John Fox <jfox@mcmaster.ca>
}

\references{
   Fox, J. (1987)
    Effect displays for generalized linear models.
    \emph{Sociological Methodology}
    \bold{17}, 347--361.
    
    Fox, J. (2003)
    Effect displays in R for generalised linear models.
    \emph{Journal of Statistical Software}
    \bold{8:15}, 1--27, <\url{http://www.jstatsoft.org/v08/i15/}>.
    
    Fox, J. and R. Andersen (2006)
    Effect displays  for multinomial and proportional-odds logit models.
    \emph{Sociological Methodology} 
    \bold{36}, 225--255.
    
    Fox, J. and J. Hong (2009).
    Effect displays in R for multinomial and proportional-odds logit models: 
    	    Extensions to the effects package.
    \emph{Journal of Statistical Software}
    \bold{32:1}, 1--24, <\url{http://www.jstatsoft.org/v32/i01/}>.
}


\keyword{ package }

