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I made an epidemics SIR model but want to vary one of the parameters but it's not working can someone help I pasted the code below I believe the parameter I want to change, v, is not updating:

Matlab:

```
v_range=linspace(0,.1,1000);
numinfected=0*v_range;
for vi=1:1000;
for klok=1:100000;
t=klok*dt;
S_to_I=dt*S*I*a;
I_to_R=dt*b*I;
nu=v_range(vi);
S_to_V=dt*nu*S;
I_to_Q=dt*I*q;
Q_to_R=dt*Q*r;
S=S-S_to_I-S_to_V;
I=I+S_to_I-I_to_R-I_to_Q;
R=R+I_to_R+Q_to_R;
V=V+S_to_V;
%store data...
```

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