为什么使用垂直方向为我的分层线图不做任何事情？

Question

如果我将水平更改为垂直在这里，轴不切换：

{
  "$schema": "https://vega.github.io/schema/vega-lite/v5.json",
  "layer": [{
      "data": {"values": [
        {"x": 0.5, "y": 0},
        {"x": 1, "y": 1},
        {"x": 2, "y": 2}]},
      "mark": {"type": "line", "orient": "horizontal"},
      "encoding": {
        "x": {"field": "x", "type": "quantitative"},
        "y": {"field": "y", "type": "quantitative"},
        "color": {"datum": "a"}}
    }, {
      "data": {"values": [
        {"x": 1, "y": 0},
        {"x": 2, "y": 1},
        {"x": 2.5, "y": 2}]},
      "mark": {"type": "line", "orient": "horizontal"},
      "encoding": {
        "x": {"field": "x", "type": "quantitative"},
        "y": {"field": "y", "type": "quantitative"},
        "color": {"datum": "b"}}
    }
  ]
}

为什么？如何使X轴和Y轴切换位置？

Answer 1

还必须切换“编码”的“ x”和“ y”属性：

{
  "$schema": "https://vega.github.io/schema/vega-lite/v5.json",
  "layer": [{
      "data": {"values": [
        {"x": 0.5, "y": 0},
        {"x": 1, "y": 1},
        {"x": 2, "y": 2}]},
      "mark": {"type": "line", "orient": "vertical"},
      "encoding": {
        "x": {"field": "y", "type": "quantitative"},
        "y": {"field": "x", "type": "quantitative"},
        "color": {"datum": "a"}}
    }, {
      "data": {"values": [
        {"x": 1, "y": 0},
        {"x": 2, "y": 1},
        {"x": 2.5, "y": 2}]},
      "mark": {"type": "line", "orient": "vertical"},
      "encoding": {
        "x": {"field": "y", "type": "quantitative"},
        "y": {"field": "x", "type": "quantitative"},
        "color": {"datum": "b"}}
    }
  ]
}