Inserting Functions into Bisection Method Code

I'm not having much luck here, I'm trying to play around with the bisection method and different functions.

I have working code I just need to know how to input the following function into the below code:

f(K) = tanh*K - F^2*K=0
Where K=2/F^2    and F=0.5

From Youtube and Google assistance I have the following code:

function RootFinder()

xU = 3; %Upper Bound
xL = 0; %lower Bound

%Setup Starting Point
xM = xL;
delx = (xU - xL)/2;
yn = myfunc(xM); 

while abs(yn) > 1e-2 %%Threshold
    xM = xM + delx;
    yStar = myfunc(xM);

    %%Set New Bounds If True
          if sign(yStar) ~= sign(yn) 
              delx = -delx;
          end
          yn = myfunc(xM);
          delx = delx/2;

end

function out = myfunc(in)
out = in.^2-2;

Thanks in advance!

Answer 1

[Venkata Siva Krishna Madala]

Hello Caleb Jones,

I understand that you would want to know what myfunc should be rewritten.I have written the function below based on my understanding of the function you have given.

function out = myfunc(in)
    out = tanh(in)-((in.^2)*in);
end

Regards,

Krishna Madala