solve f(x)=0 using bisection method

function root = bisection( f, interval, es)

[Torsten]

There are thousands of bisection codes in the internet written in MATLAB. Just search and use one of them if you are not willing or capable to write it on your own.

One code out of the thousand:

https://de.mathworks.com/matlabcentral/fileexchange/28150-bisection-method-root-finding