Undefined function or variable 'bisection'.

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Brian Reinhard
Brian Reinhard 2021-3-15
编辑： James Tursa 2021-3-15
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 个评论
Brian Reinhard
Brian Reinhard 2021-3-15
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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回答（1 个）

James Tursa
James Tursa 2021-3-15
编辑：James Tursa 2021-3-15
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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