How to assign indicies of a function imput vector
2 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
I'm trying to write a script to model a SIR epidemic. Matlab is giving me an error (not enough input arguments) when trying to define variables (S, I, R,..) as entries in the function input vector N (S=N(1), etc...).
Here's the script:
function result=SIR_Model( t, N)
%define probabilities
qi=0.005;
lamda=0.1;
gammaS=0.1;
gammaM=0.009;
pl=0.045;
pj=0.005;
qr=qi/lamda;
S=N(1);
I=N(2);
R=N(3);
Sg=N(4);
Ig=N(5);
Rg=N(6);
%Enter equations
dR=qr*I;
dI=qi*Sg*Ig-qr*I;
dS=-qi*Sg*Ig;
dRg=qr*Ig-pl*(Rg+qr*Ig)+pj*((R-Rg)+qr*(I-Ig));
dIg=qi*Sg*Ig-qr*Ig-pl*(Ig+qi*Sg*Ig)+(1-qr)*pj*(I-Ig);
dSg=-qi*Sg*Ig-pl*(Sg-qi*Sg*Ig)+pj*(S-Sg);
result=[dR, dI, dS, dRg, dIg, dSg];
%use odeXXx to solve DiffEQ
ODE45(SIR_Model, [0,2000], [999,1,0,0,0,0])
3 Kommentare
Akzeptierte Antwort
Walter Roberson
am 7 Okt. 2012
Change
ODE45(SIR_Model, [0,2000], [999,1,0,0,0,0])
to
ode45(@SIR_Model, [0,2000], [999,1,0,0,0,0])
0 Kommentare
Weitere Antworten (0)
Siehe auch
Kategorien
Mehr zu Matrix Indexing finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!