chapman: Chapman Robson catch curve survival estimator

Description Usage Arguments Value Author(s) References Examples

View source: R/chapman.r

Description

Computes the Chapman-Robson survival estimator and it's standard error from age structure data

Usage

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chapman(ages)

Arguments

ages

a vector of individual ages, coded such that the first fully-recruited age class is zero.

Value

list with elements S_hat and SE(S_hat)

Author(s)

Michael Scroggie

References

Chapman, D.G. and Robson, DS (1960) The analysis of a catch curve. Biometrics 16:354-368.

Examples

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data(geocrinia)
chapman(geocrinia$age)
randata<-rgeom(1000, 1-0.3)
chapman(randata)

scrogster/CatchCurve documentation built on May 26, 2017, 3:52 a.m.