[Scilab-users] Corona modelling

[Tim Wescott]

This will be a straightforward application of the ODE solver.

Type "help ode" for more detail.

You'll make a function that takes the vector x = [S; I; R] as an
argument and returns [S'; I'; R'].  Then you'll call that function with
some starting x and let it play out.

You can speed up computation if you provide the Jacobian of f as a
function -- if you don't, the solver will calculate it at each time
step.

On Mon, 2020-03-30 at 02:14 +0200, Heinz Nabielek wrote:
> Colleagues:
> 
> is there an straightforward Scilab approach for solving the three
> coupled nonlinear differential equations of first order given by the
> Standard Model of Epidemics?
> 
> 
> S= number Susceptible: 		S'=-aSI
> I=  number Infected:		I'=aSI - bI
> R= number Recovered: 		R'=bI
> whereby 'a' is the transmission coefficient, 'b' the recovery factor
> (after Reed-Frost 1928).
> Initial values for S, I, R are available.
> 
> Thank you
> Heinz
> _______________________________________________
> users mailing list
> users at lists.scilab.org
> http://lists.scilab.org/mailman/listinfo/users
> 
> 
-- 

Tim Wescott
www.wescottdesign.com
Control & Communications systems, circuit & software design.
Phone: 503.631.7815
Cell:  503.349.8432