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https://github.com/sgratzl/chartjs-chart-pcp
Chart.js Parallel Coordinates Plot
https://github.com/sgratzl/chartjs-chart-pcp
chartjs chartjs-plugin javascript parallel-coordinates parallel-coordinates-plot
Last synced: 18 days ago
JSON representation
Chart.js Parallel Coordinates Plot
- Host: GitHub
- URL: https://github.com/sgratzl/chartjs-chart-pcp
- Owner: sgratzl
- License: mit
- Created: 2020-04-14T12:37:23.000Z (over 4 years ago)
- Default Branch: main
- Last Pushed: 2024-10-20T17:13:30.000Z (24 days ago)
- Last Synced: 2024-10-21T06:24:34.406Z (24 days ago)
- Topics: chartjs, chartjs-plugin, javascript, parallel-coordinates, parallel-coordinates-plot
- Language: TypeScript
- Homepage: https://www.sgratzl.com/chartjs-chart-pcp/
- Size: 15.7 MB
- Stars: 26
- Watchers: 5
- Forks: 3
- Open Issues: 3
-
Metadata Files:
- Readme: README.md
- Funding: .github/FUNDING.yml
- License: LICENSE
Awesome Lists containing this project
- awesome - pcp
README
# Chart.js Parallel Coordinate Plots
[![NPM Package][npm-image]][npm-url] [![Github Actions][github-actions-image]][github-actions-url]
Chart.js module for charting parallel coordinate plots (PCPs). Adding new chart type: `pcp`.
[![Open in CodePen][codepen]](https://codepen.io/sgratzl/pen/wvKQvyM)
[![Open in CodePen][codepen]](https://codepen.io/sgratzl/pen/KKdrKZW)
## Related Plugins
Check out also my other chart.js plugins:
- [chartjs-chart-boxplot](https://github.com/sgratzl/chartjs-chart-boxplot) for rendering boxplots and violin plots
- [chartjs-chart-error-bars](https://github.com/sgratzl/chartjs-chart-error-bars) for rendering errors bars to bars and line charts
- [chartjs-chart-geo](https://github.com/sgratzl/chartjs-chart-geo) for rendering map, bubble maps, and choropleth charts
- [chartjs-chart-graph](https://github.com/sgratzl/chartjs-chart-graph) for rendering graphs, trees, and networks
- [chartjs-chart-venn](https://github.com/sgratzl/chartjs-chart-venn) for rendering venn and euler diagrams
- [chartjs-chart-wordcloud](https://github.com/sgratzl/chartjs-chart-wordcloud) for rendering word clouds
- [chartjs-plugin-hierarchical](https://github.com/sgratzl/chartjs-plugin-hierarchical) for rendering hierarchical categorical axes which can be expanded and collapsed
## Install
```bash
npm install --save chart.js chartjs-chart-pcp
```
## Usage
see [Examples](https://www.sgratzl.com/chartjs-chart-pcp/examples/)
[![Open in CodePen][codepen]](https://codepen.io/sgratzl/pen/wvKQvyM)
## PCP
### Data Structure
the data items are the regular data items along with their labels. For each attribute there is a dataset. e.g., in the following example there are three items (A, B, C) with three axes / features (f1, f2, f3).
```js
const objs = [
{ label: 'A', f1: 5, f2: 3, f4: 3 },
{ label: 'B', f1: 2, f2: 1, f4: 8 },
{ label: 'C', f1: 10, f2: 6, f4: 2 },
];
const attrs = ['f1', 'f2', 'f3'];
const config = {
type: 'pcp',
data: {
labels: objs.map((obj) => obj.label),
datasets: attrs.map((attr) => ({
label: attr,
data: objs.map((obj) => obj[attr]),
})),
},
options: {},
};
```
### Styling of elements
Two new elements were added: `lineSegment` as a subclass of line for a line segment between two axes and `linearAxis` for representing the vertical axis as a wrapper around a linear scale.
see https://github.com/sgratzl/chartjs-chart-pcp/blob/develop/src/elements/lineSegment.ts#L3-L9
see https://github.com/sgratzl/chartjs-chart-pcp/blob/develop/src/elements/axis.ts#L13-L21
## Scaling
The Parallel Coordinates controller `pcp` uses a linear scale. There is also the `logarithmicPcp` that uses a logarithmic scale.
Using chart.js hybrid charts, one can specify the type per dataset. e.g.,
```js
const config = {
type: 'pcp',
data: {
labels: ['1', '2', '3'],
datasets: [
{
label: 'A',
data: [1, 2, 3]
},
{
type: 'logarithmicPcp',
label: 'B',
data: [1, 2, 10000]
}
})),
},
options: {},
};
```
### ESM and Tree Shaking
The ESM build of the library supports tree shaking thus having no side effects. As a consequence the chart.js library won't be automatically manipulated nor new controllers automatically registered. One has to manually import and register them.
Variant A:
```js
import Chart from 'chart.js';
import { ParallelCoordinatesController, LinearAxis, LineSegment, PCPScale } from 'chartjs-chart-pcp';
Chart.register(ParallelCoordinatesController, PCPScale, LineSegment);
Chart.registry.addElements(LinearAxis);
...
new Chart(ctx, {
type: ParallelCoordinatesController.id,
data: [...],
});
```
Variant B:
```js
import { ParallelCoordinatesChart } from 'chartjs-chart-pcp';
new ParallelCoordinatesChart(ctx, {
data: [...],
});
```
## Development Environment
```sh
npm i -g yarn
yarn install
yarn sdks vscode
```
### Common commands
```sh
yarn compile
yarn test
yarn lint
yarn fix
yarn build
yarn docs
```
[npm-image]: https://badge.fury.io/js/chartjs-chart-pcp.svg
[npm-url]: https://npmjs.org/package/chartjs-chart-pcp
[github-actions-image]: https://github.com/sgratzl/chartjs-chart-pcp/workflows/ci/badge.svg
[github-actions-url]: https://github.com/sgratzl/chartjs-chart-pcp/actions
[codepen]: https://img.shields.io/badge/CodePen-open-blue?logo=codepen