Struct CsvReader 

pub struct CsvReader { /* private fields */ }

A CSV file reader with configurable parsing options.

Uses a fluent builder pattern: construct with CsvReader::new, chain optional configuration methods, then call CsvReader::finish to load the data into a DataFrame.

Example

use plotlars_core::io::CsvReader;

let df = CsvReader::new("data/penguins.csv")
    .has_header(true)
    .try_parse_dates(true)
    .finish()
    .unwrap();

Implementations

impl CsvReader

pub fn new(path: impl AsRef<Path>) -> Self

Create a new CSV reader for the given file path.

pub fn delimiter(self, delimiter: u8) -> Self

Set the column delimiter byte. Defaults to b','.

pub fn has_header(self, has_header: bool) -> Self

Set whether the first row is a header row. Defaults to true.

pub fn skip_rows(self, skip_rows: usize) -> Self

Set the number of rows to skip before reading data.

pub fn null_values(self, null_values: Vec<&str>) -> Self

Set strings that should be interpreted as null values.

pub fn try_parse_dates(self, try_parse_dates: bool) -> Self

Attempt to automatically parse date and datetime columns.

pub fn finish(self) -> Result<DataFrame, PlotlarsError>

Execute the read and return a DataFrame.

Errors

Returns PlotlarsError::Io if the file cannot be opened, or PlotlarsError::CsvParse if the CSV data cannot be parsed.

Trait Implementations

impl Clone for CsvReader

fn clone(&self) -> CsvReader

Returns a duplicate of the value.

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

Performs copy-assignment from source.