Help with a vector
3 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Lavorizia Vaughn
am 30 Sep. 2021
Kommentiert: Lavorizia Vaughn
am 30 Sep. 2021
Hello. I have come up with the following code:
function p = findmanyzeros(f, a, b, n, tol)
x = a + (b-a)*(0:n)/n;
fx = f(x);
p = [];
for i = 1:n
if sign(fx(i)) ~= sign(fx(i+1))
p(end+1) = findzero(f, x(i), x(i+1), tol);
end
end
My instructions were to Implement a MATLAB function findmanyzeros of the form function p=findmanyzeros(f, a, b, n, tol)
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
Akzeptierte Antwort
Cris LaPierre
am 30 Sep. 2021
Bearbeitet: Cris LaPierre
am 30 Sep. 2021
You have not defined a variable fx inside your findzeros function. Do you mean to use f?
You have created a recursive function but you have not defined an exit criteria. Since sign(f(i) always is the same as sign(f(i+1)), p is never assigned a value, and your result is an empty vector.
f= @(x) cos(x)-x;
f(1:10)
Weitere Antworten (0)
Siehe auch
Kategorien
Mehr zu Spline Construction finden Sie in Help Center und File Exchange
Produkte
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!