Struct CsvDataFrame 

pub struct CsvDataFrame {
    pub column_names: Vec<String>,
    pub columns: Vec<CsvColumnData>,
}

A DataFrame-like structure with named, typed columns.

Each column carries its inferred type. Construct via CsvDataFrame::from_csv or CsvDataFrame::from_str.

Fields

column_names: Vec<String>

Column names, in order.

columns: Vec<CsvColumnData>

Typed column data (parallel to column_names).

Implementations

impl CsvDataFrame

pub fn from_csv(csv: &CsvFile) -> Self

Build a CsvDataFrame from an existing CsvFile with auto type inference.

pub fn from_str(s: &str) -> Result<Self, String>

Parse a CSV string and build a CsvDataFrame with type inference.

Returns an error message with the problematic line number if parsing fails.

pub fn from_str_with_delimiter(s: &str, delim: char) -> Result<Self, String>

Parse a delimiter-separated string and build a CsvDataFrame.

pub fn n_rows(&self) -> usize

Number of rows.

pub fn n_cols(&self) -> usize

Number of columns.

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

Return the index of a column by name, or None.

pub fn column(&self, idx: usize) -> Option<&CsvColumnData>

Return a reference to the typed data of a column by index.

pub fn column_by_name(&self, name: &str) -> Option<&CsvColumnData>

Return a reference to the typed data of a column by name.

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

Extract a float column by name. Returns None if not found or wrong type.

pub fn integer_column(&self, name: &str) -> Option<&Vec<i64>>

Extract an integer column by name.

pub fn text_column(&self, name: &str) -> Option<&Vec<String>>

Extract a text column by name.

pub fn to_csv_string(&self) -> String

Serialize the DataFrame back to a CSV string (all values as strings).

Trait Implementations

impl Clone for CsvDataFrame

fn clone(&self) -> CsvDataFrame

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CsvDataFrame

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

Formats the value using the given formatter.