charton 0.4.1

A high-level, layered charting system for Rust, designed for Polars-first data workflows and multi-backend rendering.
Documentation 
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use charton::prelude::*;
use polars::prelude::*;
use std::error::Error;

#[test]
fn test_histogram_1() -> Result<(), Box<dyn Error>> {
    let df = CsvReadOptions::default()
        .with_has_header(true)
        .try_into_reader_with_file_path(Some("./assets/iris.csv".into()))?
        .finish()?;
    let df_melted = df.unpivot(
        ["sepal_length", "sepal_width", "petal_length", "petal_width"],
        ["species"],
    )?;
    println!("{}", &df_melted);

    // Create a histogram chart
    let histogram = Chart::build(&df_melted.head(Some(200)))?
        .mark_hist()?
        .configure_hist(|h| {
            h.with_color("steelblue")
                .with_opacity(0.5)
                .with_stroke("black")
                .with_stroke_width(0.0)
        })
        .encode((
            x("value"),
            y("count").with_normalize(true),
            color("variable"),
        ))?;

    histogram
        .with_size(600, 400)
        .with_title("Histogram Example")
        .with_x_label("Value")
        .with_y_label("Frequency")
        .configure_theme(|t| t.with_palette(ColorPalette::Tab10))
        .coord_flip()
        .save("./tests/histogram_1.svg")?;

    Ok(())
}