Secant

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Ashley Dunn
Ashley Dunn 2011-4-4
回答： Steve Areola 2023-7-31
Write a Matlab function secant:m which
  2 个评论
Matt Tearle
Matt Tearle 2011-4-4
which...?
I'm going to take a guess that you've been asked to write a function that implements the secant method for finding roots. So what have you done so far (ie please post your code, as appropriate), and what MATLAB-specific issues are you having?
Jan
Jan 2011-4-4
I'm not able to see the entire question. I see: "Write a Matlab function secant:m which". To be exact: This is not even a question at all.

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回答（2 个）

Sean de Wolski
Sean de Wolski 2011-4-4
secant = @(x)1./cos(x);
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Ashley Dunn
Ashley Dunn 2011-4-4
Hey guys r u able to see the entire question? It's not the secant=cos^-1
It's the secant function which is a complicated equation....
John D'Errico
John D'Errico 2011-4-4
Homework is for YOU to do, for YOU to learn from. We already know how to do it. (And it is not THAT complex of a problem.) So sit down, and make an effort.

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Steve Areola
Steve Areola 2023-7-31
clc
p0 = 0; p1 = 1; tol = 10^-6; N=12;
i = 2;
f = @(x) %write function;
q0 = f(p0); q1 = f(p1);
while i<=N
p = p1- (q1*(p1-p0))/(q1-q0);
if abs(p-p1)<tol
return
end
i = i+1
p0 = p1
p1 = p
q0 = q1
q1 = f(p)
end

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