Hi Clauss, Just modify the following lines :
t1 = 0:0.1:60; y1 = ode(y0, 0, t1, odefun); // [t1,y1] = ode45(@odefun,[0 60],y0); // run 1st scernario idx=[3:6]; scf(); a = gca(); plot(Begin+t1,y1(idx,:),'-'); // semilogy(Begin+t1,y1(:,idx),'-','LineWidth',3) And you will be fine. ode() needs a vector of time values and the output is oriented transposed w.r.t Matlab output. S. Le 30/04/2020 à 16:40, Claus Futtrup a écrit :
functiondydt=odefun(t, y)ift<daysR=R0;elseR=0.6;// Change reproductive rate after lockdownendA=[00-delta*R*y(1)/Npop000;...0-gamdelta*R*y(1)/Npop000;...0gam-delta000;...00delta*(1-Fhosp)000;...00delta*Fhosp0-1/Thosp0;...00delta*R*y(1)/Npop000];dydt=A*y;endBegin=datenum(2020,02,20,0,0,0);// begin dateDlock=datenum(2020,03,12,0,0,0);// date of lockdowndays=Dlock-Begin;R0=2.6;// inital R valuegam=1/3;// gamma, the inverse of average latent timedelta=1/5;// inv time constant which infectious people either recover or enter hospitalFhosp=0.16;// fraction of recovering people going to hospitalThosp=14;// average time of hospitalisationNpop=6e6;// total initial population of sensitivey0=[Npop;50;50;0;0;0];// [S E I R Hosp ] intial cond.t1=0:60;y1=ode(y0,0,60,odefun);// [t1,y1] = ode45(@odefun,[0 60],y0); // run 1st scernarioidx=[3:6];scf();a=gca();plot(Begin+t1,y1(:,idx),'-');// semilogy(Begin+t1,y1(:,idx),'-','LineWidth',3)a.log_flags="nln";xlabel('Date')ylabel('Number of cases')xgrid();// ax=gca;// ax.YLim=[10 max(max(y2(:,idx)))];xtitle({'Danish Corona lock down on 20.03.12, vs 14 days later','R goes from 2.6 to 0.6 at lockdown'});legend('Infected','Recovered','Hospitalised','Total Cases');
-- Stéphane Mottelet Ingénieur de recherche EA 4297 Transformations Intégrées de la Matière Renouvelable Département Génie des Procédés Industriels Sorbonne Universités - Université de Technologie de Compiègne CS 60319, 60203 Compiègne cedex Tel : +33(0)344234688 http://www.utc.fr/~mottelet
_______________________________________________ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users
