Struct ndarray_stats::histogram::strategies::Sqrt

pub struct Sqrt<T> { /* private fields */ }

Square root (of data size) strategy, used by Excel and other programs for its speed and simplicity.

Let n be the number of observations. Then

n_bins = sqrt(n)

Notes

This strategy requires the data

• not being empty
• not being constant

Implementations

impl<T> Sqrt<T> where
    T: Ord + Clone + FromPrimitive + NumOps + Zero, 

pub fn bin_width(&self) -> T

The bin width (or bin length) according to the fitted strategy.

Trait Implementations

impl<T> BinsBuildingStrategy for Sqrt<T> where
    T: Ord + Clone + FromPrimitive + NumOps + Zero, 

fn from_array<S>(a: &ArrayBase<S, Ix1>) -> Result<Self, BinsBuildError> where
    S: Data<Elem = Self::Elem>, 

Returns Err(BinsBuildError::Strategy) if the array is constant. Returns Err(BinsBuildError::EmptyInput) if a.len()==0. Returns Ok(Self) otherwise.

type Elem = T

fn build(&self) -> Bins<T>

Returns a Bins instance, according to parameters inferred from observations.

fn n_bins(&self) -> usize

Returns the optimal number of bins, according to parameters inferred from observations.

impl<T: Debug> Debug for Sqrt<T>

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

Formats the value using the given formatter.