optima {analogue}R Documentation

Weighted averaging optima and tolerance ranges

Description

Computes weighted average optima and tolerance ranges from species abundances and values of the environment.

Usage

optima(x, ...)

## Default S3 method:
optima(x, env, ...)

tolerance(x, ...)

## Default S3 method:
tolerance(x, env, useN2 = TRUE, ...)

Arguments

x Species data matrix or data frame.
env Numeric; variable for which optima or tolerances are required.
useN2 logical; should Hill's N2 values be used to produce un-biased tolerances?
... Arguments passed to other methods.

Value

Both functions return a named vector containing the WA optima or tolerances for the environmental gradient specified by env.

Author(s)

Gavin L. Simpson

References

TO DO

See Also

wa

Examples

## Load the Imbrie & Kipp data and
## summer sea-surface temperatures
data(ImbrieKipp)
data(SumSST)

## WA optima
optima(ImbrieKipp, SumSST)

## WA tolerances
tolerance(ImbrieKipp, SumSST, useN2 = TRUE)

[Package analogue version 0.6-6 Index]