Undefined function or variable 'bisection'.

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Brian Reinhard
Brian Reinhard on 15 Mar 2021
Edited: James Tursa on 15 Mar 2021
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
  1 Comment
Brian Reinhard
Brian Reinhard on 15 Mar 2021
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?

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Answers (1)

James Tursa
James Tursa on 15 Mar 2021
Edited: James Tursa on 15 Mar 2021
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.

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