exp_decay: Exponential decay

In nikolaifish/bamExtras: Functions and Data in Support of Stock Assessments with the Beaufort Assessment Model (BAM)

Exponential decay

Description

Compute numbers of individuals alive at time in a population experiencing exponential decay, allowing age-varying Z. Can be used to compute numbers at age at the beginning of the year.

Usage

exp_decay(age, Z, N1 = 1, plus_group = FALSE)

Arguments

age	ages at which to compute numbers alive. Can be fractional ages (e.g. daily, monthly) but
Z	instantaneous mortality rate
N1	number of individuals at first age (i.e. age[1]) at the beginning of the year
plus_group	Should the function include a plus group? logical

Author(s)

Nikolai Klibansky

Examples

## Not run: 
exp_decay(age=1:10,Z=0.2,N1=100)
exp_decay(age=1:10,Z=0.2,N1=100,plus_group = TRUE)
exp_decay(age=c(2,5,10),Z=0.2,N1=100,plus_group = TRUE)

## End(Not run)

nikolaifish/bamExtras documentation built on July 21, 2023, 8:26 a.m.