position_sunflower {vayr} | R Documentation |
Arrange over-plotted points in a sunflower pattern
Description
This function applies the sunflower algorithm, executed by the sunflower() function, as a position adjustment, arranging overlapping points at any given x and y into a sunflower pattern. See the sunflower() documentation for more information.
Usage
position_sunflower(density = 1, aspect_ratio = 1)
Arguments
density |
The pattern density, which defaults to 1 but will have to be adjusted in most cases. The desirable density will depend on both the ranges of the axes and the dimensions of the image. |
aspect_ratio |
An aspect ratio adjustment to compensate for distortion of the circular arrangement, which might occur when plotting if coord_equal() is not used. A wide aspect ratio (eg. 2) would adjust for vertical stretching, whereas a tall aspect ratio (eg. 0.5) would adjust for horizontal stretching. The default aspect ratio of 1 is appropriate when no adjustment is required. |
Value
A ggproto
object of class PositionSunflower
.
See Also
Other Functions:
position_circlepack()
,
position_circlepackdodge()
,
position_jitter_ellipse()
,
position_jitterdodge_ellipse()
,
position_sunflowerdodge()
,
sunflower()
Examples
library(ggplot2)
# Use the sunflower position function to arrange N points
N <- 100
dat <- data.frame(
x = rep(1:4, times = N),
y = rep(1:4, times = N)
)
ggplot(dat, aes(x = x, y = y)) +
geom_point(size = 1, position = position_sunflower(density = 1, aspect_ratio = 1)) +
xlim(0, 5) +
ylim(0, 5) +
coord_equal()