Argument of a function includes another function

Hi all,

I have a file called "fofx.m", and it has this function

function y = fofx(x)
y = cos(x) - sin(x);
end

In another file (same directory), I have

function [l,r,nf] = bisect(fname,a,b,tol)
if(a == b)
    if(fname(a) == 0)
        l = a;
        r = l;
        nf = 0;
        return;
    end
end 

The evaluation of fname at a is giving me trouble. I get a different error message, no matter how I try get this function evaluated. How can I evaluate fname at a?

Answer 1

[Walter Roberson]

[leftbound, rightbound, whatever_nf_stands_for] = bisect(@fofx, some_a, some_b, tolerance_to_use);