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Lets-Plot Kotlin API

A Grammar of Graphics for Kotlin.

official JetBrains project License MIT Latest Release

Lets-Plot Kotlin API is a <a href="https://lets-plot.org/kotlin">Kotlin API</a> for Lets-Plot Multiplatform plotting library,
which is built on the principles of layered graphics first described in the
Leland Wilkinson work The Grammar of Graphics.

<table> <tr> <td> <a href="https://ggplot2-book.org/index.html" target="_blank"> <img src="https://raw.githubusercontent.com/JetBrains/lets-plot-kotlin/master/docs/images/ggplot2-elegant-graphics-for-data-analysis.jpeg" width="150" height="228" alt="book cover"> </a> </td> <td> <p>Lets-Plot <a href="https://lets-plot.org/kotlin">Kotlin API</a> is largely based on the API<br>provided by <a href="https://ggplot2.tidyverse.org/">ggplot2</a> package well-known to data scientists who use R.</p> <p>To learn more about the <i>Grammar of Graphics</i>,<br>we recommend an excellent book called<br> <a href="https://ggplot2-book.org/index.html" target="_blank">“ggplot2: Elegant Graphics for Data Analysis”</a>.</p> <p>This will be a good prerequisite for further exploration of the Lets-Plot library.</p> </td> </tr> </table>

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Quickstart

Inside Kotlin Notebook, Datalore or Jupyter with Kotlin Kernel:

%use lets-plot
val rand = java.util.Random()
val data = mapOf(
    "rating" to List(200) { rand.nextGaussian() } + List(200) { rand.nextGaussian() * 1.5 + 1.5 },
    "cond" to List(200) { "A" } + List(200) { "B" }
)

var p = letsPlot(data)
p += geomDensity(color = "dark_green", alpha = .3) { x = "rating"; fill = "cond" }
p + ggsize(700, 350)
<img src="https://raw.githubusercontent.com/JetBrains/lets-plot-kotlin/master/docs/images/quickstart_notebook.png" alt="Couldn't load quickstart_notebook.png" width="523" height="261"/> <br/>

See the "Quickstart" notebook in Datalore or Jupyter nbviewer.

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Table of Contents

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Usage

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Notebooks

With the help of Lets-Plot Kotlin API you can easily create plots in Kotlin Notebook, Datalore, Jupyter with Kotlin Kernel
or any other notebook that supports Kotlin Kernel.

"Line Magics"

%use lets-plot

This "line magic" will apply Lets-Plot library descriptor which adds to your notebook all the boilerplate code necessary to create plots.

By default, library descriptor is bundled with the Kotlin Jupyter Kernel installed in your environment.
However, you can override the default settings using:

%useLatestDescriptors

In this case the latest library descriptor will be pulled from the Kotlin Jupyter Libraries repository.

Library Descriptor Parameters

%use lets-plot(api=4.9.0, lib=4.5.1, js=4.5.1, isolatedFrame=false)

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Compose Multiplatform

To learn how to embed Lets-Plot charts in Compose Multiplatform applications, please check out the Lets-Plot Skia Frontend project.

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JVM and Kotlin/JS

To learn more about creating plots in JVM or Kotlin/JS environment please read USAGE_SWING_JFX_JS.md.

Examples

Examples of using of the Lets-Plot Kotlin API in JVM and Kotlin/JS applications are available in the Lets-Plot Kotlin Mini Apps (Demos) GitHub repository.

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Documentation

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What is new in 4.9.0

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Recent Updates in the Gallery

<a href="https://nbviewer.org/github/JetBrains/lets-plot-docs/blob/master/source/kotlin_examples/cookbook/legend_theme.ipynb"> <img src="https://raw.githubusercontent.com/JetBrains/lets-plot-kotlin/master/Writerside/images/previews/square-legend_theme.png" alt="Customize legend appearance" width="128" height="128"> </a> <a href="https://nbviewer.org/github/JetBrains/lets-plot-docs/blob/master/source/kotlin_examples/demo/interact_pan_zoom.ipynb"> <img src="https://raw.githubusercontent.com/JetBrains/lets-plot-kotlin/master/Writerside/images/previews/square-interact_pan_zoom.png" alt="Zoom and Pan interactivity" width="128" height="128"> </a> <a href="https://nbviewer.org/github/JetBrains/lets-plot-docs/blob/master/source/kotlin_examples/demo/lp_verse.ipynb"> <img src="https://raw.githubusercontent.com/JetBrains/lets-plot-kotlin/master/Writerside/images/previews/square-lp_verse.png" alt="The observable LP-verse" width="128" height="128"> </a> <a href="https://nbviewer.org/github/JetBrains/lets-plot-docs/blob/master/source/kotlin_examples/demo/sunshine_hours.ipynb"> <img src="https://raw.githubusercontent.com/JetBrains/lets-plot-kotlin/master/Writerside/images/previews/square-sunshine_hours.png" alt="Sunshine hours" width="128" height="128"> </a> <a href="https://nbviewer.org/github/JetBrains/lets-plot-docs/blob/master/source/kotlin_examples/demo/us_unemployment.ipynb"> <img src="https://raw.githubusercontent.com/JetBrains/lets-plot-kotlin/master/Writerside/images/previews/square-us_unemployment.png" alt="Unemployment in the US since 1967" width="128" height="128"> </a> <a href="https://nbviewer.org/github/JetBrains/lets-plot-docs/blob/master/source/kotlin_examples/demo/palmer_penguins.ipynb"> <img src="https://raw.githubusercontent.com/JetBrains/lets-plot-kotlin/master/Writerside/images/previews/square-palmer_penguins.png" alt="Palmer penguins" width="128" height="128"> </a> <a href="https://nbviewer.org/github/JetBrains/lets-plot-docs/blob/master/source/kotlin_examples/demo/wind_rose.ipynb"> <img src="https://raw.githubusercontent.com/JetBrains/lets-plot-kotlin/master/Writerside/images/previews/square-wind_rose.png" alt="Wind rose" width="128" height="128"> </a>

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Change Log

See CHANGELOG.md.

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Code of Conduct

This project and the corresponding community are governed by the JetBrains Open Source and Community Code of Conduct. Please make sure you read it.

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License

Code and documentation released under the MIT license. Copyright © 2019-2024, JetBrains s.r.o.