chart-unit is a chart library providing a chart ADT, combinators and a small set of high-quality charts using native haskell.
The chart types include:
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.
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 |
Composable chart types and the power of diagrams make it easy to invent new charts. Here's some inspiration (all code for these charts is in examples/gallery.hs).
Chart.Data.Time deals with the scenario where you want to plot a time series consecutively (y values are [0..]) but there are gaps in the seris such as no data on weekend days.
Differences between text methods, across alignments
stack build --test --haddock --exec "$(stack path --local-install-root)/bin/chart-unit-source-examples" --exec "$(stack path --local-install-root)/bin/chart-unit-main-example" --exec "$(stack path --local-install-root)/bin/chart-unit-gallery" --exec "$(stack path --local-bin)/pandoc -f markdown -i other/header.md readme.md other/footer.md -t html -o index.html --filter pandoc-include --mathjax" --file-watch