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Help with Matlab function

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Lavorizia Vaughn
Lavorizia Vaughn 2021-9-29
评论： Lavorizia Vaughn 2021-9-30
hello,
i have to implement a MATLAB function findmanyzeros of the form function p = findmanyzeros(f, a, b, n, which finds zeros in the interval [a, b] using the following strategy:
1. Compute n+1 equidistant points xk , k=0,...,n, between a and b
2. For k = 1,...,n, if f(xk) and f(xk−1) have different signs, compute a zero using findzero
3. The output vector p should contain all the computed zeros
my code is as follows:
function p = findmanyzeros(f, a, b, n, tol)
n=n+1;
for k = 1:n
if f(xk)*f(xk-1)<0
findzero(f);
end
end
p
my code is wrong and i could really appriciate some help, thanks.

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Jan
Jan 2021-9-29
编辑：Jan 2021-9-30
This homework question contains useful instructions already:
"Compute n+1 equidistant points xk , k=0,...,n, between a and b"
You've omitted this step. Use the command linspace() to solve it and assign the output to the variable x.
Then you can use f(x(k)) and f(x(k+1)).
I guess, that calling findzero needs the variable tol. Assign the output of this function to p(k).
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Stephen23
Stephen23 2021-9-30
"Unrecognized function or variable 'findzero'."
FINDZERO is not a MATLAB function. Did you mean FZERO?:
https://www.mathworks.com/help/matlab/ref/fzero.html
Lavorizia Vaughn
Lavorizia Vaughn 2021-9-30
Yes I had the file findzero named wrong. Thanks for the help.

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