What is wrong with my code for the bisection method?

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Britney
Britney 2014-10-7
编辑： Britney 2014-10-8
x=my_bisect(@(x)x-2.5).*exp(-0.5*(x-2).^2)+0.2;[-1,0],1e-5)
a=I(-1);
b=I(0);
msg=sprintf('invalid choice of interval');
if f(a)*f(b)>0
disp(msg)
m=[(a+b)/2];
return
end
Can I just write my function in x=... above as is or do I have to have it saved in another .m file?
My syntax above is x = my_bisect(f,I,tol)
The error message that comes up is: Error: Unbalanced or unexpected parenthesis or bracket.
edit 1: changed my typo. Thanks Image Analyst.

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回答（1 个）

Image Analyst
Image Analyst 2014-10-8
min_bisect() is different than my_bisect(). Did you make a typo?
  2 个评论
Britney
Britney 2014-10-8
Thank you for replying.
I'm doing a school task and I need to make a function that calculates f(x) on an interval [-1,0] where f(a)*f(b) changes sign and a given accuracy of the answer. So I started with making this code. The purpose of this code is to make a error message when f is not changing sign in the interval.
I'm new to Matlab. And yeah that was typo from me.

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