I am trying to plot differential equations using ode45 and not getting a graph
Afficher commentaires plus anciens
IC = [93000;1000;1000;50;50;0;500];
tspan = [0 70];
[t,Y] = ode45(@odefun, tspan, IC);
for i = 1:size(Y, 2)
plot(t, Y(:, 1))
hold on
plot(t, Y(:, 2))
plot(t, Y(:, 3))
plot(t, Y(:, 4))
plot(t, Y(:, 5))
plot(t, Y(:, 6))
plot(t, Y(:, 7))
hold off
end
function DYdt = odefun(t,Y)
S = Y(1);
EA = Y(2);
EB = Y(3);
IA = Y(4);
IS = Y(5);
R = Y(6);
P = Y(7);
b=0.00018;
mu=0.0004563;
muP=0.1724;
alpha1=0.10;
alpha2=0.10;
beta1=0.00414;
beta2=0.0115;
delta=0.7;
O=0.7;
psi2=0.0051;
psi1=0.002;
omega1=0.22;
omega2=0.09;
sigma=0.0018;
gammaS=0.05;
gammaA=0.0714;
etaS=0.1;
etaA=0.05;
dSdt = b-((2*beta1*S*P)/(1+alpha1*P))-(2*beta2*S*(IA+IS)/1+alpha2*(IA+IS))+(psi1*EA)+(psi2*EB)-(mu*S);
dEAdt = ((beta1*S*P)/(1+alpha1*P))+(beta2*S*(IA+IS)/1+alpha2*(IA+IS))-(psi1*EA)-(mu*EA)-(omega1*EA);
dEBdt = ((beta1*S*P)/(1+alpha1*P))+(beta2*S*(IA+IS)/1+alpha2*(IA+IS))-(psi2*EB)-(mu*EB)-(omega2*EB);
dIAdt = ((1-delta)*omega1*EA)-((1-O)*omega2*EB)-(mu+sigma)*IA-(gammaS*IA);
dISdt = (delta*omega1*EA)-(O*omega2*EB)-(mu+sigma)*IS-(gammaS*IS);
dRdt = (gammaS*IS)+(gammaA*IA)-(mu*R);
dPdt = (etaA*IA)+(etaS*IS)-(muP*P);
DYdt = [dSdt; dEAdt;dEBdt;dIAdt; dISdt; dRdt; dPdt];
end
Réponse acceptée
Plus de réponses (0)
Catégories
En savoir plus sur Numerical Integration and Differential Equations dans Centre d'aide et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!