procfun0: default process noise function

In pttstability: Particle-Takens Stability

default process noise function

Description

Simulates effects of process noise following a Gaussian perturbation. Note that process noise only influences positive abundances (i.e. process noise cannot contribute to colonization)

Usage

procfun0(sp, xt, inverse = FALSE, time = NULL)

Arguments

sp	a numeric vector of length one or two, specifying either the log-transformed standard deviation of the process noise function, or an intercept and slope for calculating variance of process noise based on a power function of x, of the form var=exp(B0)*x^exp(B1)
xt	a number or numeric vector of abundances at time t, before process noise has occurred
inverse	a logical specifying whether the inverse (i.e. probability of drawing a value of zero given xt and sp) should be calcualted
time	the timestep - defaults to NULL (i.e. not used)

Value

a number or numeric vector of length xt, with predicted abundances after process noise has occurred

pttstability documentation built on May 29, 2024, 1:28 a.m.