vega-lite - Vega-Lite : 多折线图的特定标记颜色

Question

如何设置存储在数据字段中的线条颜色？在织女我做了：

marks :[
 {
   encode: {
     enter: {
       ...
       stroke: {field: "color"}
      }
    }
  }
]

Vega-Lite 有类似的方法吗？

Answer 1

您可以使用带有标记的color编码。linevega-lite 网站上有几个例子；一个相关的是多系列折线图：

{
  "$schema": "https://vega.github.io/schema/vega-lite/v2.json",
  "description": "Stock prices of 5 Tech Companies over Time.",
  "data": {"url": "data/stocks.csv"},
  "mark": "line",
  "encoding": {
    "x": {"field": "date", "type": "temporal"},
    "y": {"field": "price", "type": "quantitative"},
    "color": {"field": "symbol", "type": "nominal"}
  }
}