rphylopic (version 0.1.9.9321)

add_phylopic_base: Input an image and add to an existing plot made with base graphics

Description

Input an image and add to an existing plot made with base graphics

Usage

add_phylopic_base(img, x = NULL, y = NULL, ysize = NULL, alpha = 0.2,
  color = NULL)

Arguments

img

A png object, e.g, from using get_image()

x

x value of the silhouette center. Ignored if y and ysize are not specified.

y

y value of the silhouette center. Ignored if x and ysize are not specified.

ysize

Height of the silhouette. The width is determined by the aspect ratio of the original image. Ignored if x and y are not specified.

alpha

A value between 0 and 1, specifying the opacity of the silhouette.

color

Color to plot the silhouette in.

Details

Use parameters x, y, and ysize to place the silhouette at a specified position on the plot. If all three of these parameters are unspecified, then the silhouette will be plotted to the full height and width of the plot.

Examples

# NOT RUN {
# get a silhouette
cat <- image_data("23cd6aa4-9587-4a2e-8e26-de42885004c9", size = 128)[[1]]

# single image
plot(1, 1, type="n", main="A cat herd")
add_phylopic_base(cat, 0.5, 0.5, 0.2)

# lots of images
posx <- runif(50, 0, 1)
posy <- runif(50, 0, 1)
size <- runif(50, 0.01, 0.2)
plot(posx, posy, type="n", main="A cat herd")
for (i in 1:50) {
  add_phylopic_base(cat, posx[i], posy[i], size[i])
}
# }