bray_curtis {abdiv}R Documentation

Bray-Curtis distance


The Bray-Curtis distance is the Manhattan distance divided by the sum of both vectors.


bray_curtis(x, y)


x, y

Numeric vectors


For two vectors x and y, the Bray-Curtis distance is defined as

d(x, y) = \frac{\sum_i |x_i - y_i|}{\sum_i x_i + y_i}.

The Bray-Curtis distance is connected to many other distance measures in this package; we try to list some of the more important connections here. Relation to other definitions:


The Bray-Curtis distance between x and y. The Bray-Curtis distance is undefined if the sum of all elements in x and y is zero, in which case we return NaN.


x <- c(15, 6, 4, 0, 3, 0)
y <- c(10, 2, 0, 1, 1, 0)
bray_curtis(x, y)

# For proportions, equal to half the Manhattan distance
bray_curtis(x / sum(x), y / sum(y))
manhattan(x / sum(x), y / sum(y)) / 2

[Package abdiv version 0.2.0 Index]