[−][src]Function bacon_sci::roots::steffensen
pub fn steffensen<N: RealField + From<f64> + Copy>(
initial: N,
f: fn(_: N) -> N,
tol: N,
n_max: usize
) -> Result<N, String>
Use steffenson's method to find a fixed point
Use steffenson's method to find a value x so that f(x) = x, given a starting point.
Returns
Ok(x)
so that f(x) - x < tol
on success, Err
on failure
Params
initial
inital guess for the fixed point
f
Function to find the fixed point of
tol
Tolerance from 0 to try and achieve
n_max
maximum number of iterations
Examples
use bacon_sci::roots::steffensen; fn cosine(x: f64) -> f64 { x.cos() } //... fn example() -> Result<(), String> { let solution = steffensen(0.5f64, cosine, 0.0001, 1000)?; Ok(()) }