Struct Reader 

pub struct Reader { /* private fields */ }

DataFrame reading struct

Example

use blackjack::prelude::*;

let path = format!("{}/tests/data/basic_csv.csv", env!("CARGO_MANIFEST_DIR"));
let df = Reader::new(&path).delimiter(b',').read().unwrap();

let col1: &Series<f32> = df.get_column("col1").unwrap();
assert_eq!(col1.sum() as i32, 15);

Implementations

impl Reader

pub fn new<S: AsRef<OsStr> + ToString>(path: &S) -> Self

Create a new instance of Reader with defaults CSV params

pub fn headers(self, header: Vec<String>) -> Self

Set header, must be set if has_headers is false, and ignore if it is true

pub fn has_headers(self, yes: bool) -> Self

Whether to expect headers in the file or not.

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

Set the CSV quote character, default is b'"'

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

Set the CSV delimiter, default is b',' (comma delimited)

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

Set the CSV line terminator, default treats any of \r, \n or \r\n as a line terminator

pub fn read(&self) -> Result<DataFrame<i32>, BlackJackError>

Read a CSV file into a DataFrame where each column represents a Series supports automatic decompression of gzipped files if they end with .gz

Trait Implementations

impl Clone for Reader

fn clone(&self) -> Reader

Returns a duplicate of the value.

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

Performs copy-assignment from source.