MATLAB: Euler, Runge Kutta, and ODE45

mathematicsMATLAB

Hi so i have to create a program capable of pick the function that the user wants to utiliezed, if user wants to calculate the function base using euler method the program will select Eulers Method and so on. I know how to excute them all in different mfiles but im not sure how to put them all in one mfile. I also need another mfile where all the constant are gonna be
%RK 4TH ORDER
for j=1:n
k1=f3(x(j),y2(j));
k2=f3(x(j)+0.125,y2(j)+k1*0.125);
k3=f3(x(j)+0.125,y2(j)+k2*0.125);
k4=f3(x(j)+0.125,y2(j)+k3*0.125);
y2(j+1)=y2(j)+(0.25/6)*(k1+2*(k2+k3)+k4);
x(j+1)=x(j)+h;
end
%EULERS METHOD
for i=1:n
y(i+1)=y(i)+0.25*f1(x(i),y(i));
x(i+1)=x(i)+0.25;
end
%ODE_45
fun=@(t,y)y*(t^2–1.1)
[t,y]=ode45(fun,[0 2],1)

Best Answer

You could use a switch control block to run the method selected.
https://www.mathworks.com/help/matlab/ref/switch.html?s_tid=srchtitle
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