bisection.m

a m file for matlab the secant method

function rtn=bisection(fx,xa,xb,n)
% Bisection Method
% The first parameter fx is a external function with respect to viable x.
% xa is the left point of the initial interval
% xb is the right point of the initial interval
% n is the number of iterations.
x=xa;fa=eval(fx);
x=xb;fb=eval(fx);
for i=1:n
    xc=(xa+xb)/2;x=xc;fc=eval(fx);
    X=[i,xa,xb,xc,fc];
    disp(X),
    if fc*fa<0
        xb=xc;
    else xa=xc;
    end
end