bxp | R Documentation |
bxp
draws box plots based on the given summaries in z
.
It is usually called from within boxplot
, but can be
invoked directly.
bxp(z, notch = FALSE, width = NULL, varwidth = FALSE, outline = TRUE, notch.frac = 0.5, log = "", border = par("fg"), pars = NULL, frame.plot = axes, horizontal = FALSE, ann = TRUE, add = FALSE, at = NULL, show.names = NULL, ...)
z |
a list containing data summaries to be used in constructing
the plots. These are usually the result of a call to
|
notch |
if |
width |
a vector giving the relative widths of the boxes making up the plot. |
varwidth |
if |
outline |
if |
notch.frac |
numeric in (0,1). When |
border |
character or numeric (vector), the color of the box
borders. Is recycled for multiple boxes. Is used as default for
the |
log |
character, indicating if any axis should be drawn in
logarithmic scale, as in |
frame.plot |
logical, indicating if a ‘frame’
( |
horizontal |
logical indicating if the boxplots should be
horizontal; default |
ann |
a logical value indicating whether the default annotation (title and x and y axis labels) should appear on the plot. |
add |
logical, if true add boxplot to current plot. |
at |
numeric vector giving the locations where the boxplots
should be drawn, particularly when |
show.names |
Set to |
pars,... |
graphical parameters (etc) can be passed as
arguments to this function, either as a list ( Currently, In addition, The following arguments (or
|
An invisible vector, actually identical to the at
argument,
with the coordinates ("x" if horizontal is false, "y" otherwise) of
box centers, useful for adding to the plot.
When add = FALSE
, xlim
now defaults to xlim =
range(at, *) + c(-0.5, 0.5)
. It will usually be a good idea to
specify xlim
if the "x" axis has a log scale or width
is
far from uniform.
The R Core development team and Arni Magnusson (then at U Washington) who has provided most changes for the box*, med*, whisk*, staple*, and out* arguments.
Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth & Brooks/Cole.
require(stats) set.seed(753) (bx.p <- boxplot(split(rt(100, 4), gl(5, 20)))) op <- par(mfrow = c(2, 2)) bxp(bx.p, xaxt = "n") bxp(bx.p, notch = TRUE, axes = FALSE, pch = 4, boxfill = 1:5) bxp(bx.p, notch = TRUE, boxfill = "lightblue", frame.plot = FALSE, outline = FALSE, main = "bxp(*, frame.plot= FALSE, outline= FALSE)") bxp(bx.p, notch = TRUE, boxfill = "lightblue", border = 2:6, ylim = c(-4,4), pch = 22, bg = "green", log = "x", main = "... log = 'x', ylim = *") par(op) op <- par(mfrow = c(1, 2)) ## single group -- no label boxplot (weight ~ group, data = PlantGrowth, subset = group == "ctrl") ## with label bx <- boxplot(weight ~ group, data = PlantGrowth, subset = group == "ctrl", plot = FALSE) bxp(bx, show.names=TRUE) par(op) ## passing gap.axis=* to axis(), PR#18109: boxplot(matrix(100*rnorm(1e3), 50, 20), cex.axis = 1.5, gap.axis = -1)# showing *all* labels z <- split(rnorm(1000), rpois(1000, 2.2)) boxplot(z, whisklty = 3, main = "boxplot(z, whisklty = 3)") ## Colour support similar to plot.default: op <- par(mfrow = 1:2, bg = "light gray", fg = "midnight blue") boxplot(z, col.axis = "skyblue3", main = "boxplot(*, col.axis=..,main=..)") plot(z[[1]], col.axis = "skyblue3", main = "plot(*, col.axis=..,main=..)") mtext("par(bg=\"light gray\", fg=\"midnight blue\")", outer = TRUE, line = -1.2) par(op) ## Mimic S-Plus: splus <- list(boxwex = 0.4, staplewex = 1, outwex = 1, boxfill = "grey40", medlwd = 3, medcol = "white", whisklty = 3, outlty = 1, outpch = NA) boxplot(z, pars = splus) ## Recycled and "sweeping" parameters op <- par(mfrow = c(1,2)) boxplot(z, border = 1:5, lty = 3, medlty = 1, medlwd = 2.5) boxplot(z, boxfill = 1:3, pch = 1:5, lwd = 1.5, medcol = "white") par(op) ## too many possibilities boxplot(z, boxfill = "light gray", outpch = 21:25, outlty = 2, bg = "pink", lwd = 2, medcol = "dark blue", medcex = 2, medpch = 20)
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