Implements dMYdt for the SEI ODE model.

# S3 method for class 'SEI'
dMYdt(t, y, xds_obj, s)

Arguments

t

current simulation time

y

state vector

xds_obj

an xds object

s

the species index

Value

a numeric vector

Details

The dynamics of adult mosquitoes: $$\frac{dM}{dt} = \Lambda - \Omega \cdot M$$

The density of infected but not infectious mosquitoes: $$\frac{dY}{dt} = fq\kappa(M-Y) - \Omega \cdot Y$$

The density of infectious mosquitoes: $$\frac{dZ}{dt} = (Y-Z)/\tau - \Omega \cdot Z$$