logistic: Logistic probability

In pdolder/MixFishSim: Mixed Fishery fleet dynamics simulation tool

Logistic probability

Description

logistic is a helper function to generate a logistic curve to transition through the fishery stages (exploratory > transition > established). Where ~0 is exploratory fishing and ~1 is established on past knowledge. Only Q (can be set at tmax/100) and t (current tow) need to be supplied.

Usage

logistic(A = 0, K = 0.95, C = 1, Q = 200, B = NULL, v = 1, t = NULL)

Arguments

A	is the lower asymptote, set at 0
K	is the upper asymptote, set at 0.95 (to keep some few exploratory tows, even when established)
C	= 1
Q	defines the lower curve, related to Y at 0, usefully set at tmax/100
B	is the growth rate, e.g· 0.001
v	affects bear where asymptote maximum growth occurs, set at 1

Examples

 NOT RUN

pdolder/MixFishSim documentation built on Oct. 17, 2023, 4:25 p.m.