seirmod2 {epimdr}

Gradient-function for the forced SEIR model

Description

Gradient-function for the forced SEIR model

Usage

seirmod2(t, y, parms)

Arguments

t

Implicit argument for time

y

A vector with values for the states

parms

A vector with parameter values for the SIR system

Value

A list of gradients

Examples

require(deSolve)
times  = seq(0, 10, by=1/120)
paras  = c(mu = 1/50, N = 1, beta0 = 1000, beta1 = 0.2, sigma = 365/8, gamma = 365/5)
start = c(S=0.06, E=0, I=0.001, R = 0.939)
out=ode(y=start, times=times, func=seirmod2, parms=paras)