Struct ta::indicators::StandardDeviation

pub struct StandardDeviation { /* fields omitted */ }

Standard deviation (SD).

Returns the standard deviation of the last n values.

Formula

Where:

• σ - value of standard deviation for N given probes.
• N - number of probes in observation.
• x_i - i-th observed value from N elements observation.

Parameters

• n - number of periods (integer greater than 0)

Example

use ta::indicators::StandardDeviation;
use ta::Next;

let mut sd = StandardDeviation::new(3).unwrap();
assert_eq!(sd.next(10.0), 0.0);
assert_eq!(sd.next(20.0), 5.0);

Links

• Standard Deviation, Wikipedia

Methods

impl StandardDeviation

pub fn new(n: u32) -> Result<Self>

Trait Implementations

impl Clone for StandardDeviation

fn clone(&self) -> StandardDeviation

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for StandardDeviation

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Default for StandardDeviation

fn default() -> Self

Returns the "default value" for a type.

impl Display for StandardDeviation

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl<'a, T: Close> Next<&'a T> for StandardDeviation

type Output = f64

fn next(&mut self, input: &'a T) -> Self::Output

impl Next<f64> for StandardDeviation

type Output = f64

fn next(&mut self, input: f64) -> Self::Output

impl Reset for StandardDeviation

fn reset(&mut self)