README.md

In cmartin/ggConvexHull: Add a convex hull geom to ggplot2

ggConvexHull : Add a convex hull geom to ggplot2

This package adds a geom_convexhull function, extending the geom_polygon one.

To install :

library(devtools)
devtools::install_github("cmartin/ggConvexHull")

Examples :

The simplest case

library(ggplot2)
library(ggConvexHull)

n <- 10
test_df <- data.frame(
  a = runif(n),
  b = runif(n)
)

ggplot(test_df,aes(x = a,y = b)) +
  geom_point() +
  geom_convexhull(alpha = 0.3, fill = "blue")

It is especially useful to visualize the output of ordination functions with a polygon per group, e.g.

library(vegan)
library(ggplot2)
library(ggConvexHull)

data("iris")

df <- as.data.frame(
  scores(rda(iris[,1:3]))$site
)

df$Species = iris$Species

ggplot(df,aes(x = PC1, y = PC2,col = Species)) +
  geom_convexhull(alpha = 0.3,aes(fill = Species)) + 
  geom_point() +
  theme_minimal()

cmartin/ggConvexHull documentation built on May 14, 2019, 7:42 a.m.