rtypes_Millar {TropFishR}

Millar's selectivity types

Description

This function returns a function corresponding to the type of curve which was selected to represent the selectivity of nets or hooks.

Usage

rtypes_Millar(rtype)

Arguments

rtype

a character string indicating which method for the estimation of selection curves should be used: "norm.loc" for normal with common spread method, "norm.sca" for normal with variable spread method, "lognorm" for lognormal method, "binorm.sca" for bi-normal method, "bilognorm" for bi-lognormal method, "tt.logistic" for control and logistic method, "gamma" for gamma method.

Details

Function adapted from the selectivity functions provided by Prof. Dr. Russell Millar (https://www.stat.auckland.ac.nz/~millar/). Until now following curves are incorporated: "norm.loc" for a normal curve with common spread, "norm.sca" for a normal curve with variable spread, "lognorm" for a lognormal curve, "binorm.sca" for a bi-normal curve, "bilognorm" for a bi-lognormal curve, "tt.logistic" for a control and logistic curve.

Source

https://www.stat.auckland.ac.nz/~millar/selectware/

References

Millar, R. B., Holst, R., 1997. Estimation of gillnet and hook selectivity using log-linear models. ICES Journal of Marine Science: Journal du Conseil, 54(3), 471-477.