seir: The SEIR model for virus spread

In SEIR: Susceptible, Exposed, Infectious, Removed Model

Description

The function that solves the SEIR system of differential equations.

Usage

SEIR(t, y, y0, c=0, sigma=1/5.2, gamma=1/18,
     r0=matrix(c(0,20,70,84,90,3,2.6,1.9,1,.5),ncol=2),
     type=c("Lin", "Const"))    

solveSEIR(h=1e-2, T=180, c=0, y0=c(11e6, 40, 800, 0),
          sigma=1/5.2, gamma=1/18,
          r0=matrix(c(0,20,70,84,90,3,2.6,1.9,1,.5),ncol=2),
          type=c("Lin", "Const"))

Arguments

t	Time value to evaluate the derivatives.
y	The vector is variable of interest: S, E, I and R.
y0	Initial Values
sigma	Parameter.
gamma	Parameter.
c	Mutation Parameter
h	Step size for the RK4 method
T	Final t
r0	Matrix of breaking points for R-Zero. The first column is the time of the breaking points, and the second is the values of the R-zero.
type	Types of R-Zero function. The default is a linear interpolation and the second is a piecewise constant function.

Value

It returns an object of class "seir"

References

Wang, H., Wang, Z., Dong, Y. et al (2020), Phase-adjusted estimation of the number of Coronavirus Disease 2019 cases in Wuhan, China. Cell Discov, 6, 10.

SEIR documentation built on April 14, 2020, 3:09 p.m.