StackGenVis: Alignment of Data, Algorithms, and Models for Stacking Ensemble Learning Using Performance Metrics
https://doi.org/10.1109/TVCG.2020.3030352
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75 lines
2.4 KiB
75 lines
2.4 KiB
# regl-error2d [](http://github.com/badges/stability-badges)
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Draw error bars for a set of points with regl.
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Remake on [gl-error2d](https://github.com/gl-vis/gl-error2d):
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* `color` may define per-bar colors.
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* max number of points extended 40 times (from `1e5` to `4e6`) via instanced draw.
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* `lineWidth` and `capSize` are adjusted to actual pixels.
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* enhanced performance via vertex shader.
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[Demo](https://dy.github.io/regl-error2d).
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## Usage
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[](https://npmjs.org/package/regl-error2d/)
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```js
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let regl = require('regl')({extensions: 'angle_instanced_arrays'})
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let createError2d = require('regl-error2d')
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let error2d = createError2d(regl)
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error2d({
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positions: [0,0, .5,0, ...],
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errors: [.5,.5,.5,.6, .2,.3,.4,.1, ...],
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color: 'rgba(0, 100, 200, .75)'
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})
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```
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### `createError2d(regl, options?)`
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Create new error2d instance from `regl` and initial `options`. Note that `regl` instance should have `ANGLE_instanced_arrays` extension enabled.
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### `error2d(options|list?)`
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Draw errors, update options.
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Option | Default | Description
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---|---|---
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`positions`, `points`, `data` | `[]` | An array of unrolled xy coordinates of the points as `[x,y, x,y, ...]` or array of points `[[x,y], [x,y], ...]`.
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`errors`, `error` | `[]` | Array with error values corresponding to the points `[e0l,e0r,e0b,e0t, e1l,e1r,e1b,e1t, ...]`
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`capSize`, `cap` | `5` | Error bar cap size, in pixels
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`lineWidth`, `thickness` | `1` | Error bar line width, in pixels
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`color`, `colors` | `'red'` | Color or array with colors. Each color can be a css color string or an array with float `0..1` values.
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`opacity` | `1` | Error bars opacity.
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`range`, `dataBox` | `null` | Visible data range.
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`viewport`, `viewBox` | `null` | Output area within the canvas.
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A list of options can be passed for batch rendering:
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```js
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error2d([options1, options2, ...])
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```
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### `error2d.update(options|list)`
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Update options, not incurring redraw.
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### `error2d.draw(id?)`
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Draw errors based on last options. `id` integer can specify a list item to redraw from batch update.
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### `error2d.destroy()`
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Dispose error2d and associated resources.
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## License
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(c) 2017 Dima Yv. MIT License
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Development supported by plot.ly.
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