Struct DataFrame 

pub struct DataFrame {
    pub columns: Vec<(String, Column)>,
}

Columnar data storage. Each column is a contiguous typed buffer.

Immutable once constructed — mutations go through TidyFrame (copy-on-write) or produce new DataFrames.

Fields

columns: Vec<(String, Column)>

Implementations

impl DataFrame

pub fn new() -> Self

Create an empty DataFrame with no columns.

pub fn from_columns(columns: Vec<(String, Column)>) -> Result<Self, DataError>

Create a DataFrame from named columns.

All columns must have the same length.

pub fn nrows(&self) -> usize

Number of rows (from first column, or 0 if empty).

pub fn ncols(&self) -> usize

Number of columns.

pub fn get_column(&self, name: &str) -> Option<&Column>

Get a column by name.

pub fn column_index(&self, name: &str) -> Option<usize>

Get column index by name.

pub fn column_names(&self) -> Vec<&str>

Get column names.

Trait Implementations

impl Clone for DataFrame

fn clone(&self) -> DataFrame

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DataFrame

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

Formats the value using the given formatter.

impl Default for DataFrame

fn default() -> Self

Returns the “default value” for a type.