Vega-Lite 中的平行坐标？

是否可以创建平行坐标维加精简版 https://vega.github.io/vega-lite/？我正在寻找一个简单但功能强大的 JavaScript 绘图库，并且需要支持平行坐标。

I have googled https://www.google.com/search?q=vega-lite+parallel+coordinates但只找到了如何做到这一点Vega https://vega.github.io/vega/examples/parallel-coordinates/.

是的，您可以通过组合窗口变换和折叠变换在 Vega-Lite 中创建平行坐标图。这是 Iris 数据集的示例（Vega 编辑器链接 https://vega.github.io/editor/#/url/vega-lite/N4KABGBEAmCGAutIC4yghSBXATgGxSjkQHoBLHMgZwDoArKgewDtJwwBfAGncnh1jMqAM0Y4AtoQDa7CMEgB3Ms2iMF0+YwAOhSAGNGWZvEhcosKruXQApgA9IHALrdZaSKLzRpkLTcR4ADI2zADm8AAWplB+AQDqZNCR0ZBUNlqwQSHhUWap6ZkJSVEu7E48mOKwOADWunjKNqa8IQbQyqGE6Bj6jHhiXXwAnn66zIziypkpwmQ2XrpUfnpzlq4YRP6wZASo8vAjTaiQ45PM03mz897H1vaOFT3asCsHgwBumVhHYAAMNABmdY9Bx7YajY6nKYES5zBbHGo2IYPNyQZFgg4QqAARywgngZEQBPeTVh110nzw30c7GBikSyVQADZfr9HpAIjYyKEIiZUADWSAOEA):

{
  "data": {
    "url": "data/iris.json"
  },
  "transform": [
    {"window": [{"op": "count", "as": "index"}]},
    {"fold": ["petalLength", "petalWidth", "sepalLength", "sepalWidth"]}
  ],
  "mark": "line",
  "encoding": {
    "color": {"type": "nominal", "field": "species"},
    "detail": {"type": "nominal", "field": "index"},
    "opacity": {"value": 0.3},
    "x": {"type": "nominal", "field": "key"},
    "y": {"type": "quantitative", "field": "value"}
  },
  "width": 600,
  "height": 300
}

注意我们使用窗口变换 https://vega.github.io/vega-lite/docs/window.html构造一个索引，然后是折叠变换 https://vega.github.io/vega-lite/docs/fold.html重组数据以进行绘图。