ecodist (version 1.1.0)

bcdist: Bray-Curtis distance

Description

Returns the Bray-Curtis (also known as Sorenson, 1 - percent similarity) pairwise distances for the objects in the data. It has been superseded by distance() but remains for backward compatibility.

Usage

bcdist(x, rmzero = FALSE)

Arguments

x

matrix or data frame with rows as samples and columns as variables (such as species). Distances will be calculated for each pair of rows.

rmzero

If rzero=TRUE, empty rows will be removed from the data before distances are calculated. Otherwise, the distance between two empty rows is assumed to be 0 (the default).

Value

• This function returns a column-order lower-triangular distance matrix. The returned object has an attribute, Size, giving the number of objects, that is, nrow(x). The length of the vector that is returned is nrow(x)*(nrow(x)-1)/2.

See Also

dist

Examples

data(iris)
iris.bc <- bcdist(iris[,1:4], "mahal")

# A full example is available in the distance 
# section of the main help file for \link{ecodist}.