geom_circle_cm: Geom Layer for Circle with Absolute Size

In plothelper: New Plots Based on 'ggplot2' and Functions to Create Regular Shapes

Description

This layer uses centimeter as unit to draw circles so that the size and shape will not be influenced by the change of the coordinate systems (even when a polar system is used). Note: this function does not have linetype and n arguments.

Usage

geom_circle_cm(
  mapping = NULL,
  data = NULL,
  stat = "identity",
  position = "identity",
  na.rm = FALSE,
  show.legend = NA,
  inherit.aes = TRUE,
  linetype = NULL,
  ...
)

Arguments

mapping	aes mapping.
data	data.
stat	stat.
position	position.
na.rm	logical, whether to remove NA values.
show.legend	whether to show legend.
inherit.aes	logical, whether to inherit aes from ggplot().
linetype	should always be NULL. because it will not be used.
...	additional parameters.

Details

Accepted properties are:

• (1) rcm radius in centimeter.

• (2) color color of the outline.

• (3) fill color inside the shape.

• (4) alpha alpha of color and fill.

• (5) size line width of the outline.

• (6) x x coordinates of the middle points.

• (7) y y coordinates of the middle points.

Examples

library(ggplot2)
dat=data.frame(x=1: 10, y=rep(5, 10), R=rep(c(0.5, 1), 5))
ggplot(dat)+xlim(0, 11)+ylim(1, 9)+
	geom_circle_cm(aes(x=x, y=y, fill=factor(R)), rcm=dat$R, alpha=0.5)

plothelper documentation built on July 2, 2020, 4:03 a.m.