how to plot graph for SIR epidemic model

my SIR epidemic model is

dS/dt= beta-lembda*I*S-u*S;
dI/dt=lembda*I*S-u*I-gamma*R;
dR/dt=gamma*R-u*R;
t=0:1:100;
gamma=.10;
lembda=.5;
u=.2;
S=50;I=20;R=30;

[KSSV]

What have you attempted?

[Ruksana Shaikh]

function x = sir(t, x)

x(1)=0:50:100;

x(2)=0:10:50;

x(3)=0:10:70;

beta = .5;

delta = .3;

x(1) = -beta * x(1) * x(2);

x(2) = beta * x(1) * x(2) - delta * x(2);

x(3) = delta * x(2);

plot (t,x(1),t,x(2),t,x(3))

end

[Ruksana Shaikh]

please guide me

[Ruksana Shaikh]

function x = sir(t, x)

x(1)=0:50:100;

x(2)=0:10:50;

x(3)=0:10:70;

beta = .5;

delta = .3;

x(1) = -beta * x(1) * x(2);

x(2) = beta * x(1) * x(2) - delta * x(2);

x(3) = delta * x(2);

plot (t,x(1),t,x(2),t,x(3))

end

[Sunday Aloke]

Please I need help on the matrix in the document attached. My MATLAB has no symbolic toolbox as in to run, can someone help me and get the determinants of the matrices l?

Thanks

[andy]

Bonjour à tous je suis entrain de travailler sur un modèle SVEIR structuré sur 7 variables S, V1 V2 Vm E I et R. je souhaite être guider s'il vous plaît.

Answer 1

[andy]

Bonjour à tous je suis entrain de travailler sur un modèle SVEIR structuré sur 7 variables S, V1 V2 Vm E I et R. je souhaite être guider s'il vous plaît.