I am need in need of some help with creating this regula falsi function. Below is the function I have created along with the definitions for the variables in the function, however when trying to run in the command prompt, I get the error "Subscript indices must either be real positive integers or logicals" and points to the line with f(b) = fun(b). I don't really understand what this error means and what exactly its looking at.
FYI, I am new to matlab, so any help would be much appreciated.
fun = @(in)(in^.2 - 5); %defined in the command windowfunction [ x ] = falsi(fun,a,b,epsilon) %functions I createddisp(' I a b x');disp('======= ======= ======= ======');k=0;f(a)=fun(a);f(b)=fun(b);%t=linspace(b,a,100);%f = fun(t);%plot(t,f);%hold on%set(fig,'color','white')%grid onwhile f(x) > epsilonk=k+1;x = (a*f(b) - b*f(a))/(f(b)-f(a));f(x)=fun(x);fprintf('%5i,%11.4f;%11.4f,%11.4f\n',k,a,b,x);if f(a)*f(x)< 0a = x;f(a) = f(x);elseif f(a)*f(x)> 0b = x;f(b) = f(x);elsebreakendend