Struct StrMatrix 

pub struct StrMatrix { /* private fields */ }

Row-major matrix of strings used by the categorical encoders.

Implementations

impl StrMatrix

pub fn new(data: Vec<Vec<String>>) -> Result<Self>

Creates a string matrix from a nested vector, validating a rectangular shape.

pub fn from_column<I, S>(col: I) -> Result<Self>

where I: IntoIterator<Item = S>, S: Into<String>,

Creates a single-column string matrix from an iterator of values.

pub fn from_strings<I, S>(rows: I) -> Result<Self>

where I: IntoIterator<Item = Vec<S>>, S: Into<String>,

Creates a string matrix from an iterator of rows.

pub fn nrows(&self) -> usize

Returns the number of rows.

pub fn ncols(&self) -> usize

Returns the number of columns.

pub fn get(&self, i: usize, j: usize) -> &str

Returns the string at row i, column j.

Panics

Panics if i >= nrows() or j >= ncols(). Use checked_get for a safe alternative.

pub fn checked_get(&self, i: usize, j: usize) -> Option<&str>

Returns Some(element) at row i, column j, or None if the indices are out of bounds.

pub fn column(&self, j: usize) -> Vec<String>

Returns column j as a new vector of strings.

pub fn column_refs(&self, j: usize) -> Vec<&str>

Returns column j as a vector of string slices borrowing from the matrix.

Unlike column, this does not allocate or copy the cell strings, which is faster when the column is only inspected.

pub fn row(&self, i: usize) -> &[String]

Returns the row at index i as a slice.

Trait Implementations

impl Clone for StrMatrix

fn clone(&self) -> StrMatrix

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StrMatrix

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for StrMatrix

Available on crate feature serde only.

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for StrMatrix

fn eq(&self, other: &StrMatrix) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for StrMatrix

Available on crate feature serde only.

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for StrMatrix