| lv3 {simecol} | R Documentation |
Lotka-Volterra-Type Model with Resource, Prey and Predator
Description
simecol example: predator prey-model with three equations:
predator, prey and resource (e.g. nutriens, grassland).
Usage
data(lv3)
Format
A valid S4 object according to the odeModel
specification. The object contains the following slots:
main- Lotka-Volterra equations for predator
prey and resource
.
parms- Vector with named parameters of the model:
c- growth rate of the prey population,
d- encounter rate of predator and prey,
e- yield factor (allows conversion with respect to
d),
f- death rate of the predator population,
g- recycling parameter.
inputs- Time series specifying external delivery of resource.
times- Simulation time and integration interval.
init- Vector with start values for
s, p and k.
s- Resource (e.g. grassland or phosphorus).
p- Producer (prey).
k- Consumer (predator).
solver- Character string specifying the integration method.
See Also
simecol-package,
sim,
parms,
init,
times.
Examples
data(lv3)
plot(sim(lv3))
solver(lv3) <- "lsoda"
plot(sim(lv3)) # wrong! automatic time step overlooks internal inputs
plot(sim(lv3, hmax=1)) # integration with correct maximum time step
[Package
simecol version 0.5-2
Index]