chart-unit: Native haskell charts.

[ bsd3, charts, deprecated, library ] [ Propose Tags ]
Deprecated. in favor of chart-svg

chart-unit is a native haskell charting library designed:

  • as a chart DSL and algebra

  • towards a minimalist look and feel

  • to provide a set of default values that are robust across differet data and physical chart scales

  • around provision of a small but core set of chart types.

See chart-unit for a chart gallery.

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Maintainer's Corner

For package maintainers and hackage trustees


Versions [RSS], 0.3.0, 0.3.1, 0.3.2, 0.4.0, 0.4.1, 0.5.0, 0.5.1, 0.5.2, 0.5.3, 0.5.4,,,,,,,,
Dependencies base (>=4.7 && <5), chart-unit, colour, containers, data-default, diagrams-lib, diagrams-rasterific, diagrams-svg, foldl, formatting, lens, linear, mwc-probability, mwc-random, numhask (>=0.0.5 && <1), numhask-range (>=0.0.3 && <1), palette, primitive, protolude, SVGFonts, tdigest, text [details]
License BSD-3-Clause
Copyright 2016 Tony Day
Author Tony Day
Category charts
Home page
Source repo head: git clone
Uploaded by tonyday567 at 2017-09-03T04:00:37Z
Distributions NixOS:
Executables chart-source-examples
Downloads 11246 total (65 in the last 30 days)
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Status Docs available [build log]
Last success reported on 2017-09-03 [all 1 reports]

Readme for chart-unit-0.5.1

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Build Status Hackage lts nightly

chart-unit is a haskell chart library focusing on a small set of high-quality charts using native haskell. Here's a recent example, chock-a-block full of titles and legends (that needed testing):

Chart Types

So far, there are 8 major chart types:

Why the name chart-unit?

Most of the behind-the-scenes grunt work is scaling data, projecting points from one range to another, and computing position. A key to making these computations neat was one = Range -0.5 0.5 and one = Rect -0.5 0.5 -0.5 0.5 as the (multiplicative) units of a chart range. See numhask-range for a monologue.

What's with the funny names?

Charting is an age-old craft, and stuffed to the brim with cliche and jargon. I wanted to cut through the cruft of what is thought of as a chart (and charting has been dominated by excel for 30 years), and approach charting from a haskelly perspective. The funny names were the cohorts that popped out. A rough translation:

ye-old Chart type chart-unit type
line LineChart
line chart with markers GLineChart
scatter GlyphChart
pie pull requests welcome
heatmap PixelChart
Bar RectChart
Histogram RectChart
sparkline a skinny Aspect


The main chart types and the power of diagrams make it easy to invent new charts. Hrere's some inspiration (all code for these charts is in examples/sourceExamples.hs).


labelled bar

histogram diff

combined scatter histogram





stack build --test --exec "$(stack path --local-install-root)/bin/chart-source-examples" --exec "$(stack path --local-bin)/pandoc -f markdown -i other/ other/ -t html -o index.html --filter pandoc-include --mathjax" --file-watch