I want to loop by giving the C stops at a value less than 0.0001.

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Angkhana Noyhiran
Angkhana Noyhiran 2015-6-17
编辑： Mischa Kim 2015-6-17
Hi all, I tried to work on bisection method. However, that is an error at the loop. Please help me correct them. Thank you,
A=input('Enter A: ');
B=input('Enter B: ');
func = @(x) exp(x)-2*cos(x);
for i=1:10
C=(A+B)/2
FC=func(C);
FB=func(B);
if(FC*FB>0)
B=C;
else
A=C;
end
end

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回答（1 个）

Mischa Kim
Mischa Kim 2015-6-17
编辑：Mischa Kim 2015-6-17
Angkhana, almost there.
A = input('Enter A: ');
B = input('Enter B: ');
func = @(x) exp(x)-2*cos(x);
err = 1e-4;
while abs(func(B))>err
C = (A+B)/2;
FC = func(C);
FB = func(B)
if (FC*FB>0)
B = C;
else
A = C;
end
end
I recommend using a while loop with an adequate breaking condition, though.

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