Struct rgsl::types::chebyshev::ChebSeries

pub struct ChebSeries { /* fields omitted */ }

Methods

impl ChebSeries

fn new(n: usize) -> Option<ChebSeries>

fn init<T>(&mut self, func: function<T>, a: f64, b: f64, param: &mut T) -> Value

This function computes the Chebyshev approximation cs for the function f over the range (a,b) to the previously specified order. The computation of the Chebyshev approximation is an O(n²⁾ process, and requires n function evaluations.

fn order(&self) -> usize

This function returns the order of Chebyshev series cs.

fn size(&self) -> usize

This function returns the size of the Chebyshev coefficient array c[] for the Chebyshev series cs.

fn as_slice<'r>(&'r self) -> &'r [f64]

This function returns a pointer to the coefficient array c[] location in memory for the Chebyshev series cs.

fn as_mut_slice<'r>(&'r mut self) -> &'r mut [f64]

This function returns a pointer to the coefficient array c[] location in memory for the Chebyshev series cs.

fn eval(&self, x: f64) -> f64

This function evaluates the Chebyshev series cs at a given point x.

fn eval_err(&self, x: f64, result: &mut f64, abs_err: &mut f64) -> Value

This function computes the Chebyshev series cs at a given point x, estimating both the series result and its absolute error abserr. The error estimate is made from the first neglected term in the series.

fn eval_n(&self, order: usize, x: f64) -> f64

This function evaluates the Chebyshev series cs at a given point x, to (at most) the given order order.

fn eval_n_err(
    &self,
    order: usize,
    x: f64,
    result: &mut f64,
    abs_err: &mut f64
) -> Value

This function evaluates a Chebyshev series cs at a given point x, estimating both the series result and its absolute error abserr, to (at most) the given order order. The error estimate is made from the first neglected term in the series.

fn calc_deriv(&self, deriv: &mut ChebSeries) -> Value

This function computes the derivative of the series cs, storing the derivative coefficients in the previously allocated deriv. The two series cs and deriv must have been allocated with the same order.

fn calc_integ(&self, integ: &mut ChebSeries) -> Value

This function computes the integral of the series cs, storing the integral coefficients in the previously allocated integ. The two series cs and integ must have been allocated with the same order. The lower limit of the integration is taken to be the left hand end of the range a.

Trait Implementations

impl Drop for ChebSeries

fn drop(&mut self)

A method called when the value goes out of scope.