how to fix this

% Function to perform Regula-Falsi method

function root = regula_falsi(f, a, b,tol)

fa = f(a);

fb = f(b);

Answer 1

[Image Analyst]

You're not returning anything even though you said you would. In other words, you're not assigning "root" even though you are trying to return it. Try

% Function to perform Regula-Falsi method
% f is a vector and a and b are indexes to that vector.
% tol is passed in but not used for some reason.
function [fa, fb] = regula_falsi(f, a, b, tol)
fa = f(a);
fb = f(b);

[iko123]

Thank you so much it worked

[Image Analyst]

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[iko123]

Sorry I am new to this