Undefined function or variable 'bisection'.

function [x,e] = mybisect (f,a,b,n)

c = f(a);

z = f(b);

if (f(a)*f(b) > 0)

error ('Function has ame sign at both endpoints')

end

disp(' x y')

for i = 1:n

x = (a+b)/2;

y = f(x);

disp([ x y])

if y == 0.0

a = x;

b = x;

break

end

if c.y < 0.0

b = x;

else

a = x;

end

end

x = (a+b)/2;

e = (b-a)/2;

end

[Brian Reinhard]

when i use:

>> f=inline('@(x) cos*x+sin*x','x');

>> akar=bisection(f,2,4,20,1e-2)

it will show:

Undefined function or variable 'bisection'.

Pls someone can tell me where is the problem?

Answer 1

[James Tursa]

From the error message, it looks like you are calling the function using the name "bisection", but the actual name of the function is "mybisect". Hence the error.