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% File src/library/graphics/man/plotfactor.Rd
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% File src/library/graphics/man/plotfactor.Rd
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% Part of the R package, https://www.R-project.org
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% Part of the R package, https://www.R-project.org
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% Copyright 1995-2009 R Core Team
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% Copyright 1995-2024 R Core Team
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% Distributed under GPL 2 or later
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% Distributed under GPL 2 or later
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\name{plot.factor}
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\name{plot.factor}
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\alias{plot.factor}
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\title{Plotting Factor Variables}
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\title{Plotting Factor Variables}
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\usage{
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\usage{
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\method{plot}{factor}(x, y, legend.text = NULL, \dots)
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\method{plot}{factor}(x, y, legend.text = NULL, ...)
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}
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}
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\alias{plot.factor}
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\arguments{
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\arguments{
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\item{x, y}{numeric or factor. \code{y} may be missing.}
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\item{x, y}{numeric or factor. \code{y} may be missing.}
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\item{legend.text}{character vector for annotation of y axis in the
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\item{legend.text}{character vector for annotation of y axis in the
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case of a factor \code{y}: defaults to \code{levels(y)}. This
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case of a factor \code{y}: defaults to \code{levels(y)}. This
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sets the \code{yaxlabels} argument of \code{\link{spineplot}}.}
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sets the \code{yaxlabels} argument of \code{\link{spineplot}}.}
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\item{\dots}{Further arguments to \code{\link{barplot}},
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\item{\dots}{Further arguments to \code{\link{barplot}},
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\code{\link{boxplot}}, \code{\link{spineplot}} or
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\code{\link{boxplot}}, \code{\link{spineplot}} or
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\code{\link{plot}} as appropriate. All of these accept
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\code{\link{plot}} as appropriate. All of these accept
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\link{graphical parameters} (see \code{\link{par}}) and
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\link{graphical parameters} (see \code{\link{par}}),
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annotation arguments passed
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annotation arguments passed
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to \code{\link{title}} and \code{axes = FALSE}. None accept \code{type}.
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to \code{\link{title}}, and \code{axes = FALSE}. None accept \code{type}.
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}
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}
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}
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}
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\description{
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\description{
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This method is used for
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This method is used for
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\code{\link{factor}} arguments of the \emph{generic}
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\code{\link{factor}} arguments of the \emph{generic}
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\code{\link{plot}} function,
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\code{\link{plot}} function,
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possibly called from the formula method (see the Examples).
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possibly called from the formula method.
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If \code{y} is missing \code{\link{barplot}} is produced.
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If \code{y} is missing a \code{\link{barplot}} is produced.
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For numeric \code{y} a \code{\link{boxplot}} is used, and for a factor
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For numeric \code{y} a \code{\link{boxplot}} is used, and for a factor
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\code{y} a \code{\link{spineplot}} is shown. For any other type of
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\code{y} a \code{\link{spineplot}} is shown. For any other type of
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\code{y} the next \code{plot} method is called, normally
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\code{y} the next \code{plot} method is called, normally
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\code{\link{plot.default}}.
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\code{\link{plot.default}}.
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}
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}
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\code{\link{plot.default}}, \code{\link{plot.formula}},
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\code{\link{plot.default}}, \code{\link{plot.formula}},
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\code{\link{barplot}}, \code{\link{boxplot}}, \code{\link{spineplot}}.
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\code{\link{barplot}}, \code{\link{boxplot}}, \code{\link{spineplot}}.
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}
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}
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\examples{
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\examples{
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require(grDevices)
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require(grDevices)
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plot(state.region)
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% this does not call plot.factor!
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## called from the formula method
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% plot(PlantGrowth) # -> plot.data.frame
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plot(~ group, data = PlantGrowth)
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plot(weight ~ group, data = PlantGrowth) # numeric vector ~ factor
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plot(weight ~ group, data = PlantGrowth) # numeric ~ factor
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plot(cut(weight, 2) ~ group, data = PlantGrowth) # factor ~ factor
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plot(cut(weight, 2) ~ group, data = PlantGrowth) # factor ~ factor
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## passing "..." to spineplot() eventually:
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## passing "..." to spineplot() eventually:
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plot(cut(weight, 3) ~ group, data = PlantGrowth,
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plot(cut(weight, 3) ~ group, data = PlantGrowth,
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col = hcl(c(0, 120, 240), 50, 70))
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col = hcl(c(0, 120, 240), 50, 70))
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