how to change simulink matlab (bellow) to code matlab? How do I enter the initial value?

how to change simulink matlab (bellow) to code matlab?

How do I enter the initial value?

dShdt=lambdah+(k*Rh)-(1-u1)*betam*Sh-muh*Sh;

dEvdt=(1-u1)*landav*Sv-p*u3*Ev-(a2+muv)*Ev;

Answer 1

[J Chen]

https://www.mathworks.com/help/matlab/ref/ode45.html

[af af]

hi

I removed the following article its robust controller and used a fractional-order PID instead.

But there is a problem in the simulation that one of the control signals (u_3) becomes negative (figure below).

Can you help solve this problem?

The simulation program in MATLAB is come attach.

(article name: Control of malaria outbreak using a nonlinear robust strategy with adaptive gains)

The simulation uses the FOMCON Toolbox for MATLAB.