eqr {benthos}

Ecological Quality Ratio (EQR)

Description

The ecological quality ratio is the ratio beween a parameter value and its reference value:

EQR = \frac{x-bad}{ref-bad}

Depending on bad and ref, the EQR usually (but not necessarily!) varies between 0 (bad ecological quality) and 1 ( ecological quality equals the reference status).

Usage

eqr(x, bad, ref)

Arguments

x

numeric vector containing benthic indices

bad

the value for a bad status

ref

the value for a reference status

Value

numeric vector with EQR-values: low values indicate bad ecological quality and high values indicate good ecological quality.