# population.age.matrix.model: The PopulationAge model (Population Dynamics with Age... In ZeBook: ZeBook Working with dynamic models for agriculture and environment

## Description

Population Dynamics Model with Age Classes for an insect Exactly the same model as population.age.model, but written as a matrix computation. It's possible for this model. It's really more efficient and reduce computer time by 6! 7 states variables E : egg stage. homogenous population (density) (number per ha) L1 : larvae1 stage. homogenous population (density) (number per ha) L2 : larvae2 stage. homogenous population (density) (number per ha) L3 : larvae3 stage. homogenous population (density) (number per ha) L4 : larvae4 stage. homogenous population (density) (number per ha) P : pupae stage. homogenous population (density) (number per ha) A : adult stage. homogenous population (density) (number per ha)

## Usage

 ```1 2 3 4 5``` ``` population.age.matrix.model(rb = 3.5, mE = 0.017, rE = 0.172, m1 = 0.06, r12 = 0.217, m2 = 0.032, r23 = 0.313, m3 = 0.022, r34 = 0.222, m4 = 0.02, r4P = 0.135, mP = 0.02, rPA = 0.099, mA = 0.027, iA = 0, duration = 100, dt = 1) ```

## Arguments

 `rb` : eggs laid per adult per unit area (day-1) `rE` : eggs hatch (day-1) `r12` : relative rate L1->L2 (day-1) `r23` : relative rate L2->L3 (day-1) `r34` : relative rate L3->L4 (day-1) `r4P` : relative rate L4->P (day-1) `rPA` : relative rate P->A (day-1) `mE` : relative mortality rate of egg (day-1) `m1` : relative mortality rate of larvae L1 (day-1) `m2` : relative mortality rate of larvae L2 (day-1) `m3` : relative mortality rate of larvae L3 (day-1) `m4` : relative mortality rate of larvae L4 (day-1) `mP` : relative mortality rate of purpae (day-1) `mA` : relative mortality rate of adult L1 (day-1) `iA` : input rate of adult (unit.day-1) `duration` : simulation duration `dt` : time step for integration

## Value

data.frame with values for state variables for each time step.

ZeBook documentation built on May 29, 2017, 5:14 p.m.