Struct DataFrame 

pub struct DataFrame { /* private fields */ }

DataFrame - A tabular data structure with labeled columns

Implementations

impl DataFrame

pub fn new() -> Self

Create a new empty DataFrame

pub fn from_columns(columns: IndexMap<String, Series>) -> DataFrameResult<Self>

Create DataFrame from columns

pub fn from_map(data: HashMap<String, Vec<XdlValue>>) -> DataFrameResult<Self>

Create DataFrame from a HashMap of column names to data vectors

pub fn nrows(&self) -> usize

Get number of rows

pub fn ncols(&self) -> usize

Get number of columns

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

Get column names

pub fn column(&self, name: &str) -> DataFrameResult<&Series>

Get a column by name

pub fn column_mut(&mut self, name: &str) -> DataFrameResult<&mut Series>

Get a mutable column by name

pub fn add_column( &mut self, name: String, series: Series, ) -> DataFrameResult<()>

Add a new column

pub fn remove_column(&mut self, name: &str) -> DataFrameResult<Series>

Remove a column

pub fn select(&self, column_names: &[&str]) -> DataFrameResult<DataFrame>

Select specific columns

pub fn filter<F>(&self, predicate: F) -> DataFrameResult<DataFrame>

where F: Fn(usize, &HashMap<String, &XdlValue>) -> bool,

Filter rows based on a predicate function

pub fn row(&self, index: usize) -> DataFrameResult<HashMap<String, XdlValue>>

Get a row as a HashMap

pub fn shape(&self) -> (usize, usize)

Get shape as (nrows, ncols)

pub fn info(&self) -> String

Get DataFrame info summary

pub fn head(&self, n: usize) -> DataFrameResult<DataFrame>

Head - get first n rows

pub fn tail(&self, n: usize) -> DataFrameResult<DataFrame>

Tail - get last n rows

pub fn describe(&self) -> DataFrameResult<HashMap<String, HashMap<String, f64>>>

Describe - get statistical summary

pub fn to_json(&self) -> Vec<JsonValue>

Convert to JSON representation

pub fn to_xdl_value(&self) -> XdlResult<XdlValue>

Convert to XdlValue (nested array)

pub fn sort_by( &self, column_names: &[&str], ascending: bool, ) -> DataFrameResult<DataFrame>

Sort by column(s)

pub fn groupby(&self, column_names: &[&str]) -> DataFrameResult<GroupBy>

Group by column(s) - returns grouped data for aggregation

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.