{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "background": "white",
  "padding": 5,
  "width": 300,
  "height": 200,
  "style": "cell",
  "data": [
    {
      "name": "source_0",
      "values": [
        {"u": 1, "v": 28},
        {"u": 2, "v": 55},
        {"u": 3, "v": 42},
        {"u": 4, "v": 34},
        {"u": 5, "v": 36},
        {"u": 6, "v": 48}
      ]
    },
    {
      "name": "data_0",
      "source": "source_0",
      "transform": [
        {"type": "formula", "expr": "toNumber(datum[\"u\"])", "as": "u"}
      ]
    }
  ],
  "signals": [
    {
      "name": "interpolate",
      "value": "linear",
      "bind": {
        "input": "select",
        "options": [
          "basis",
          "cardinal",
          "catmull-rom",
          "linear",
          "monotone",
          "natural",
          "step",
          "step-after",
          "step-before"
        ]
      }
    },
    {
      "name": "tension",
      "value": 0,
      "bind": {"input": "range", "min": 0, "max": 1, "step": 0.05}
    }
  ],
  "marks": [
    {
      "name": "marks",
      "type": "area",
      "style": ["area"],
      "sort": {"field": "datum[\"u\"]"},
      "from": {"data": "data_0"},
      "encode": {
        "update": {
          "interpolate": {"signal": "interpolate"},
          "tension": {"signal": "tension"},
          "orient": {"value": "vertical"},
          "fill": {"value": "#4c78a8"},
          "description": {
            "signal": "\"u: \" + (format(datum[\"u\"], \"\")) + \"; v: \" + (format(datum[\"v\"], \"\"))"
          },
          "x": {"scale": "x", "field": "u"},
          "y": {"scale": "y", "field": "v"},
          "y2": {"scale": "y", "value": 0},
          "defined": {
            "signal": "isValid(datum[\"u\"]) && isFinite(+datum[\"u\"]) && isValid(datum[\"v\"]) && isFinite(+datum[\"v\"])"
          }
        }
      }
    }
  ],
  "scales": [
    {
      "name": "x",
      "type": "linear",
      "domain": {"data": "data_0", "field": "u"},
      "range": [0, {"signal": "width"}],
      "nice": true,
      "zero": false
    },
    {
      "name": "y",
      "type": "linear",
      "domain": {"data": "data_0", "field": "v"},
      "range": [{"signal": "height"}, 0],
      "nice": true,
      "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": "u",
      "labelFlush": true,
      "labelOverlap": true,
      "tickCount": {"signal": "ceil(width/40)"},
      "zindex": 0
    },
    {
      "scale": "y",
      "orient": "left",
      "grid": false,
      "title": "v",
      "labelOverlap": true,
      "tickCount": {"signal": "ceil(height/40)"},
      "zindex": 0
    }
  ]
}