area_horizon.vg.json

{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "description": "Horizon Graph with 2 layers. (See https://idl.cs.washington.edu/papers/horizon/ for more details on Horizon Graphs.)",
  "background": "white",
  "padding": 5,
  "width": 300,
  "height": 50,
  "style": "cell",
  "data": [
    {
      "name": "source_0",
      "values": [
        {"x": 1, "y": 28},
        {"x": 2, "y": 55},
        {"x": 3, "y": 43},
        {"x": 4, "y": 91},
        {"x": 5, "y": 81},
        {"x": 6, "y": 53},
        {"x": 7, "y": 19},
        {"x": 8, "y": 87},
        {"x": 9, "y": 52},
        {"x": 10, "y": 48},
        {"x": 11, "y": 24},
        {"x": 12, "y": 49},
        {"x": 13, "y": 87},
        {"x": 14, "y": 66},
        {"x": 15, "y": 17},
        {"x": 16, "y": 27},
        {"x": 17, "y": 68},
        {"x": 18, "y": 16},
        {"x": 19, "y": 49},
        {"x": 20, "y": 15}
      ]
    },
    {
      "name": "data_0",
      "source": "source_0",
      "transform": [
        {"type": "formula", "expr": "toNumber(datum[\"x\"])", "as": "x"}
      ]
    },
    {
      "name": "data_1",
      "source": "data_0",
      "transform": [
        {
          "type": "impute",
          "field": "y",
          "groupby": [],
          "key": "x",
          "method": "value",
          "value": 0
        },
        {
          "type": "stack",
          "groupby": ["x"],
          "field": "y",
          "sort": {"field": [], "order": []},
          "as": ["y_start", "y_end"],
          "offset": "zero"
        }
      ]
    },
    {
      "name": "data_2",
      "source": "data_0",
      "transform": [
        {"type": "formula", "expr": "datum.y - 50", "as": "ny"},
        {
          "type": "impute",
          "field": "ny",
          "groupby": [],
          "key": "x",
          "method": "value",
          "value": 0
        },
        {
          "type": "stack",
          "groupby": ["x"],
          "field": "ny",
          "sort": {"field": [], "order": []},
          "as": ["ny_start", "ny_end"],
          "offset": "zero"
        }
      ]
    }
  ],
  "marks": [
    {
      "name": "layer_0_marks",
      "type": "area",
      "clip": true,
      "style": ["area"],
      "sort": {"field": "datum[\"x\"]"},
      "from": {"data": "data_1"},
      "encode": {
        "update": {
          "opacity": {"value": 0.6},
          "orient": {"value": "vertical"},
          "fill": {"value": "#4c78a8"},
          "description": {
            "signal": "\"x: \" + (format(datum[\"x\"], \"\")) + \"; y: \" + (format(datum[\"y\"], \"\"))"
          },
          "x": {"scale": "x", "field": "x"},
          "y": {"scale": "y", "field": "y_end"},
          "y2": {"scale": "y", "field": "y_start"},
          "defined": {
            "signal": "isValid(datum[\"x\"]) && isFinite(+datum[\"x\"]) && isValid(datum[\"y\"]) && isFinite(+datum[\"y\"])"
          }
        }
      }
    },
    {
      "name": "layer_1_marks",
      "type": "area",
      "clip": true,
      "style": ["area"],
      "sort": {"field": "datum[\"x\"]"},
      "from": {"data": "data_2"},
      "encode": {
        "update": {
          "orient": {"value": "vertical"},
          "fill": {"value": "#4c78a8"},
          "opacity": {"value": 0.3},
          "description": {
            "signal": "\"x: \" + (format(datum[\"x\"], \"\")) + \"; ny: \" + (format(datum[\"ny\"], \"\"))"
          },
          "x": {"scale": "x", "field": "x"},
          "y": {"scale": "y", "field": "ny_end"},
          "y2": {"scale": "y", "field": "ny_start"},
          "defined": {
            "signal": "isValid(datum[\"x\"]) && isFinite(+datum[\"x\"]) && isValid(datum[\"ny\"]) && isFinite(+datum[\"ny\"])"
          }
        }
      }
    }
  ],
  "scales": [
    {
      "name": "x",
      "type": "linear",
      "domain": {
        "fields": [
          {"data": "data_1", "field": "x"},
          {"data": "data_2", "field": "x"}
        ]
      },
      "range": [0, {"signal": "width"}],
      "nice": false,
      "zero": false
    },
    {
      "name": "y",
      "type": "linear",
      "domain": [0, 50],
      "range": [{"signal": "height"}, 0],
      "zero": true
    }
  ],
  "axes": [
    {
      "scale": "x",
      "orient": "bottom",
      "gridScale": "y",
      "grid": true,
      "tickCount": {"signal": "ceil(width/40)"},
      "domain": false,
      "labels": false,
      "aria": false,
      "maxExtent": 0,
      "minExtent": 0,
      "ticks": false,
      "zindex": 0
    },
    {
      "scale": "y",
      "orient": "left",
      "gridScale": "x",
      "grid": true,
      "tickCount": {"signal": "ceil(height/40)"},
      "domain": false,
      "labels": false,
      "aria": false,
      "maxExtent": 0,
      "minExtent": 0,
      "ticks": false,
      "zindex": 0
    },
    {
      "scale": "x",
      "orient": "bottom",
      "grid": false,
      "title": "x",
      "labelFlush": true,
      "labelOverlap": true,
      "tickCount": {"signal": "ceil(width/40)"},
      "zindex": 0
    },
    {
      "scale": "y",
      "orient": "left",
      "grid": false,
      "title": "y",
      "labelOverlap": true,
      "tickCount": {"signal": "ceil(height/40)"},
      "zindex": 0
    }
  ],
  "config": {
    "style": {
      "area": {"interpolate": "monotone"},
      "tick": {"discreteBandSize": {"band": 0.75}}
    }
  }
}