# R: Gradient-function for the SIR model

sirmod {epimdr} | R Documentation

## Gradient-function for the SIR model

### Description

Gradient-function for the SIR model

### Usage

    sirmod(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, 26, by=1/10)
    paras  = c(mu = 0, N = 1, beta =  2, gamma = 1/2)
    start = c(S=0.999, I=0.001, R = 0)
    out=ode(y=start, times=times, func=sirmod, parms=paras)

[Package epimdr version 0.6-4 Index]