polygon2: polygon2

Description Usage Arguments Examples

View source: R/plot_extra.R

Description

Draw regular polygons as plotting characters. This function calculates the {x,y} coordinates for given centroids and radii and passes each pair of vectors to polygon to draw. Note that all arguments except x, y, radius, sides, and srt are passed directly to polygon, so see ?polygon for additional details.

Usage

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polygon2(x, y = NULL, radius, sides = 6, srt = 0, density = NULL,
  angle = 45, border = NULL, col = NA, lty = par("lty"),
  fillOddEven = FALSE, ...)

Arguments

x, y

x- and y-coordinate vectors of polygon centroids

radius

distance from centroid to each vertex

sides

number of sides for polygons; since only regular polygons may be plotted, possible values are (1:360)[360L %% 1:360 == 0L]

srt

rotation in degrees for polygon

density

density of shading lines in lines per inch

angle

slope of shading lines, given as an angle in degrees (counter- clockwise)

border

polygon border color

col

polygon fill color

lty

line type to be used for border and/or shading lines

fillOddEven

logical controlling polygon shading mode

...

additional graphical parameters such as xpd, lend, ljoin, and lmitre passed to par

Examples

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## sides can be any of
(sides <- (1:360)[360L %% 1:360 == 0L])
plot.new()
for (ii in sides)
  polygon2(0.5, 0.5, sides = ii)  ## okay
# polygon2(0.5, 0.5, sides = 7)   ## error

x <- mtcars$mpg
y <- mtcars$wt
plot(x, y, type = 'n', asp = 1)
polygon2(x, y, density = 30, angle = 90, col = mtcars$gear)
polygon2(x, y + 1, srt = 30, lty = 'dotted', col = 'transparent')
polygon2(x, y + -2, radius = .5, sides = 5)

raredd/plotr documentation built on Nov. 19, 2018, 11:02 a.m.