Struct DataFrame 

pub struct DataFrame {
    pub columns: HashMap<String, Vec<f64>>,
    pub timestamps: Vec<i64>,
    pub id: String,
    pub timeframe: Timeframe,
}

Generic columnar storage for time series data

Stores data as named columns of f64 values, plus timestamps. No knowledge of specific column names (open, high, low, close, etc.) is encoded here - that’s determined by the data source.

Fields

columns: HashMap<String, Vec<f64>>

Column name -> column data

timestamps: Vec<i64>

Timestamps (always present, Unix seconds)

id: String

Generic identifier

timeframe: Timeframe

Timeframe of the data

Implementations

impl DataFrame

pub fn new(id: &str, timeframe: Timeframe) -> Self

Create a new empty DataFrame

pub fn with_capacity(id: &str, timeframe: Timeframe, capacity: usize) -> Self

Create a DataFrame with pre-allocated capacity

pub fn from_rows( id: &str, timeframe: Timeframe, rows: Vec<OwnedDataRow>, ) -> Self

Create from a list of rows

pub fn add_column(&mut self, name: &str, data: Vec<f64>)

Add a column of data

pub fn get_column(&self, name: &str) -> Option<&[f64]>

Get a column by name

pub fn get_column_mut(&mut self, name: &str) -> Option<&mut Vec<f64>>

Get a mutable column by name

pub fn row_count(&self) -> usize

Get the number of rows

pub fn is_empty(&self) -> bool

Check if empty

pub fn column_count(&self) -> usize

Get the number of columns

pub fn column_names(&self) -> impl Iterator<Item = &str>

Get column names

pub fn has_column(&self, name: &str) -> bool

Check if a column exists

pub fn get_row(&self, index: usize) -> Option<DataRow<'_>>

Get a row view at the given index

pub fn get_timestamp(&self, index: usize) -> Option<i64>

Get timestamp at index

pub fn get_value(&self, row: usize, column: &str) -> Option<f64>

Get value at (row, column)

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

Create a schema from this DataFrame’s columns

pub fn slice(&self, start: usize, end: usize) -> Self

Slice the DataFrame to a range of rows

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.