dispRity.fast {dispRity}

Fast dispRity

Description

Fast disparity calculations. THIS FUNCTION IS LESS SAFE TO USE THAN dispRity (see details).

Usage

dispRity.fast(group, space, metric, ...)

Arguments

group

a logical vector for grouping

space

a matrix

metric

a metric dispRity style (up to two levels)

...

any additional arguments to be passed to metric

Details

IN DOUBT, USE dispRity INSTEAD OF THIS FUNCTION. This function should only be used in very specific cases requiring advanced optimisation or embedded customised functions. This function is simply applying metric(space[group,]) for each group and returns a list of results. It does not check the validity of the data, metric and groups. It does not handle specific data (e.g. multiple matrices), specific metrics (e.g. no optional arguments), does not produce meaningful error messages and does not intake nor returns a dispRity object.

Author(s)

Thomas Guillerme

Examples

## A random space
space <- matrix(rnorm(25), 5, 5)

## A metric
metric <- c(sum, variances)

## A group of four observations
group <- c(TRUE, TRUE, TRUE, TRUE, FALSE)

## The disparity
dispRity.fast(group, space, metric)