Vega-Lite V4 for Rust

A Rust API for Vega-Lite V4 to build chart with a rusty API.

Similar to the Altair project in python, this crate build upon Vega-Lite specifications. Vega-Lite is a high-level grammar of interactive graphics. It provides a concise JSON syntax for rapidly generating visualizations to support analysis. Vega-Lite specifications can be compiled to Vega specifications. Those specifications are then parsed by Vega’s JavaScript runtime to generate both static images or interactive web-based views. This crate has a complete mapping of Vega-Lite 3.4 specification and can be found in src/schema.rs. With all the types and structs, it's possible to create your Rust Vegalite graph that will be serialize into a Vega-Lite JSON. Thanks to Showata the resulting visualization can be display in your Web-Browser or in a Rust Jupyter Notebook. It's also possible to use an existing Vega-Lite json and plug your data source seamlessly. This way you can leverage existing vizualisation and adapt it to your design.

Examples

In order to have a complete mapping of the Vega-Lite V4 specification the code for the schema was automaticlly generated. To help describe all the possible features a gallery of example is provided on github

Simple chart using ndarray generated data

```rust let values: Array2 = Array::random((100, 2), StandardNormal);

let chart = VegaliteBuilder::default() .title("Random points") .data(values) .mark(Mark::Point) .encoding( EncodingBuilder::default() .x(XClassBuilder::default() .field("data.0") .deftype(StandardType::Quantitative) .build()?) .y(YClassBuilder::default() .field("data.1") .deftype(StandardType::Quantitative) .build()?) .build()?, ) .build()?; chart.show()?; ```

Simple chart using existing json definition with new data

```rust // Use existing vega-lite json specification let spec = r##"{ "$schema": "https://vega.github.io/schema/vega-lite/v4.0.json", "encoding": { "x": { "field": "data.0", "type": "quantitative" }, "y": { "field": "data.1", "type": "quantitative" } }, "mark": "point", "title": "Random points" }"##;

// Use you own data to populate the chart let values: Array2 = Array::random((100, 2), StandardNormal); let mut chart: Vegalite = serdejson::fromstr(spec)?; chart.data = values.into();

// display the chart using showata chart.show()?; ```

Features

| name | enabled by default | functionnality | related crate | | --------- | ------------------ | -------------------------------------------------- | --------------------------------------------- | | show_vega | yes | can display charts in the browser or in a notebook | showata | | csv | yes | can load data from a csv | csv | | ndarray | yes | can load data from a ndarray | ndarray | | nalgebra | no | can load data from a nalgebra::Matrix | nalgebra | | rulinalg | no | can load data from a rulinalg::matrix::Matrix | rulinalg |

Vega-Lite V4 for Rust

Examples

Simple chart using ndarray generated data

Simple chart using existing json definition with new data

Features

Links