Polycenter {shipunov} | R Documentation |
Finds polygon center
Polycenter(x)
x |
Polygon vertices: two-column numerical matrix or data frame |
Based on vegan::summary.ordihulls().
Named numerical vector of length 2 (x and y coordinates of the center).
Alexey Shipunov
x <- c(1:9, 8:1) # from ?polygon
y <- c(1, 2*(5:3), 2, -1, 17, 9, 8, 2:9)
Polycenter(cbind(x, y)) # numerical matrix
Polycenter(data.frame(x, y)) # numerical data frame
iris.p <- prcomp(iris[, -5])$x[, 1:2]
iris.h <- Hulls(iris.p, iris$Species, plot=FALSE)
sapply(iris.h, Polycenter)