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Plotje

Composable plotting in Clojure

Plotje is a Clojure library for composable plotting, inspired by the Grammar of Graphics.

General info
Website https://scicloj.github.io/plotje/
Source (GitHub repo)
Deps Clojars Project
License MIT
Status 🛠alpha🛠

Usage

While the first release 0.1.0 is being prepared, install Plotje directly from GitHub by adding this to your deps.edn:

io.github.scicloj/plotje
{:git/url "https://github.com/scicloj/plotje.git"
 :git/sha "<sha-from-main>"}

Once 0.1.0 is published to Clojars, the install line will become:

org.scicloj/plotje {:mvn/version "0.1.0"}

Plotje is intended to be used with data-visualization tools that support the Kindly convention such as Clay.

Quick example

Line chart with point markers from plain Clojure data:

(-> [{:month "Jan" :sales 120}
     {:month "Feb" :sales 95}
     {:month "Mar" :sales 140}
     {:month "Apr" :sales 175}
     {:month "May" :sales 160}
     {:month "Jun" :sales 210}]
    (pj/lay-line :month :sales)
    pj/lay-point
    (pj/options {:title "Monthly Sales"}))

Scatter plot matrix (SPLOM) — all pairwise combinations with color grouping:

(-> (rdatasets/datasets-iris)
    (pj/pose {:color :species})
    (pj/pose (pj/cross [:sepal-length :sepal-width
                        :petal-length :petal-width]
                       [:sepal-length :sepal-width
                        :petal-length :petal-width]))
    (pj/options {:title "Iris SPLOM"}))

Documentation

Full documentation

License

Copyright © 2025-2026 Scicloj

Distributed under the MIT License.