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@molcrafts/molplot

v0.1.3

Published

MolPlot: Vega-Lite scientific charting primitives with a unified, matplotlib-portable preset

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roy_kidroy_kid

Keywords

Readme

@molcrafts/molplot

Vega-Lite scientific charting primitives — line, scatter, bar, gantt, and a raw spec passthrough — with a shared, matplotlib-portable preset and a lazily-loaded Vega runtime.

Part of MolPlot: every chart builds a Vega-Lite spec (the portable intermediate language) and renders it with vega-embed. The same spec can be rendered to a matplotlib figure by the Python package molcrafts-molplot, so web and paper figures share one description and one preset.

Install

npm install @molcrafts/molplot vega vega-lite vega-embed

The Vega runtime is loaded lazily and externalized from the build, so a consumer that never renders a chart never pays for the bundle.

Usage

import { LineChart, ScatterChart, CHART_PALETTE } from "@molcrafts/molplot";

const chart = new LineChart(container, {
  preset: "molplot",       // unified preset; "molplot-paper" also ships
  theme: "auto",           // tracks <html class="dark">
  series: [{ id: "e", label: "Energy", initialPoints: pts }],
});
await chart.ready();
chart.appendPoint("e", { x, y });     // cheap streaming update (view.data)
chart.onPointClick((e) => console.log(e.seriesId, e.index));

API

Chart classes (imperative, framework-agnostic): LineChart, ScatterChart, BarChart, GanttChart, RawChart. Each takes (container, config) and exposes ready(), resize(), dispose(), and typed on*Click handlers; LineChart adds setSeries / appendPoint / appendPoints / clear / setWindow / setAxisRange.

Spec builders (the intermediate language, no DOM): lineSpec, scatterSpec, barSpec, ganttSpec. Theme / preset: resolveTheme, vegaConfig, getPreset, CHART_PALETTE, CHART_DEFAULT_COLOR.

Migration from the plotly build: the chart classes and config/event types are unchanged. RawChart now takes a Vega-Lite spec ({ spec }) instead of a plotly { data, layout, config } payload.

License

BSD-3-Clause