HSIgeomean {ecorest}

Habitat Suitability Index with Geometric Mean

Description

HSIgeomen uses geometric mean to combine suitability indices into an overarching habitat suitability index.

Usage

HSIgeomean(x)

Arguments

x

a vector of suitability indices

Value

A value of habitat quality from 0 to 1 ignoring NA values.

References

US Fish and Wildlife Service. (1980). Habitat as a basis for environmental assessment. Ecological Services Manual, 101.

US Fish and Wildlife Service. (1980). Habitat Evaluation Procedures (HEP). Ecological Services Manual, 102.

US Fish and Wildlife Service. (1981). Standards for the Development of Habitat Suitability Index Models. Ecological Services Manual, 103.

Examples

#Determine patch quality based on a vector of four suitability indices.
HSIgeomean(c(0.25, 0.25, 0.25, 0.25))

#Determine patch quality based on a vector of suitability indices with an NA.
HSIgeomean(c(0.25, 0.25, NA, 0.25))

#Determine patch quality based on a vector of suitability indices with a zero-value.
HSIgeomean(c(0.25, 0.25, 0.0, 0.25))

#Demonstrate error message associated with out of range outcomes.
HSIgeomean(c(2, 2, NA, 3))