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% File src/library/graphics/man/boxplot.Rd
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% File src/library/graphics/man/boxplot.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 1995-2019 R Core Team
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% Copyright 1995-2026 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{boxplot}
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\name{boxplot}
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\alias{boxplot}
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\alias{boxplot}
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\alias{boxplot.default}
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\alias{boxplot.default}
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ylab = mklab(y_var =!horizontal),
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ylab = mklab(y_var =!horizontal),
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add = FALSE, ann = !add, horizontal = FALSE,
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add = FALSE, ann = !add, horizontal = FALSE,
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drop = FALSE, sep = ".", lex.order = FALSE)
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drop = FALSE, sep = ".", lex.order = FALSE)
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\method{boxplot}{default}(x, \dots, range = 1.5, width = NULL, varwidth = FALSE,
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\method{boxplot}{default}(x, \dots, range = 1.5, width = NULL, varwidth = FALSE,
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notch = FALSE, outline = TRUE, names, plot = TRUE,
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notch = FALSE, warnN = TRUE, outline = TRUE, names, plot = TRUE,
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border = par("fg"), col = "lightgray", log = "",
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border = par("fg"), col = "lightgray", log = "",
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pars = list(boxwex = 0.8, staplewex = 0.5, outwex = 0.5),
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pars = list(boxwex = 0.8, staplewex = 0.5, outwex = 0.5),
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ann = !add, horizontal = FALSE, add = FALSE, at = NULL)
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ann = !add, horizontal = FALSE, add = FALSE, at = NULL)
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}
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}
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\arguments{
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\arguments{
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\item{notch}{if \code{notch} is \code{TRUE}, a notch is drawn in
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\item{notch}{if \code{notch} is \code{TRUE}, a notch is drawn in
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each side of the boxes. If the notches of two plots do not
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each side of the boxes. If the notches of two plots do not
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overlap this is \sQuote{strong evidence} that the two medians differ
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overlap this is \sQuote{strong evidence} that the two medians differ
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(Chambers \abbr{et al.}, 1983, p.\sspace{}62). See \code{\link{boxplot.stats}}
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(Chambers \abbr{et al.}, 1983, p.\sspace{}62). See \code{\link{boxplot.stats}}
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for the calculations used.}
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for the calculations used.}
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\item{warnN}{logical. When \code{notch = TRUE}, indicating if a
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\code{\link{warning}} should be signalled when some notch gets
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outside the hinges, i.e., the box.}
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\item{outline}{if \code{outline} is not true, the outliers are
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\item{outline}{if \code{outline} is not true, the outliers are
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not drawn (as points whereas S+ uses lines).}% the argument name is most ugly but S+ compatible
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not drawn (as points whereas S+ uses lines).}% the argument name is most ugly but S+ compatible
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\item{names}{group labels which will be printed under each boxplot.
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\item{names}{group labels which will be printed under each boxplot.
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Can be a character vector or an \link{expression} (see
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Can be a character vector or an \link{expression} (see
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\link{plotmath}).}
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\link{plotmath}).}
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sets).
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sets).
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}
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}
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\examples{
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\examples{
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## boxplot on a formula:
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## boxplot on a formula:
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boxplot(count ~ spray, data = InsectSprays, col = "lightgray")
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boxplot(count ~ spray, data = InsectSprays, col = "lightgray")
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# *add* notches (somewhat funny here <--> warning "notches .. outside hinges"):
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# *add* notches and do *not* warn about "notches .. outside hinges":
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boxplot(count ~ spray, data = InsectSprays,
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boxplot(count ~ spray, data = InsectSprays,
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notch = TRUE, add = TRUE, col = "blue")
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notch = TRUE, warnN = FALSE, add = TRUE, col = "blue")
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boxplot(decrease ~ treatment, data = OrchardSprays, col = "bisque",
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boxplot(decrease ~ treatment, data = OrchardSprays, col = "bisque",
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log = "y")
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log = "y")
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## horizontal=TRUE, switching y <--> x :
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## horizontal=TRUE, switching y <--> x :
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boxplot(decrease ~ treatment, data = OrchardSprays, col = "bisque",
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boxplot(decrease ~ treatment, data = OrchardSprays, col = "bisque",
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