{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "background": "white",
  "padding": 5,
  "width": 600,
  "height": 300,
  "title": {"text": "Seattle Temperature Range, 2012-2015", "frame": "group"},
  "style": "cell",
  "data": [
    {
      "name": "source_0",
      "url": "data/seattle-weather.csv",
      "format": {
        "type": "csv",
        "parse": {"date": "date", "temp_max": "number", "temp_min": "number"}
      },
      "transform": [
        {
          "field": "date",
          "type": "timeunit",
          "units": ["month", "date"],
          "as": ["monthdate_date", "monthdate_date_end"]
        },
        {
          "type": "aggregate",
          "groupby": ["monthdate_date"],
          "ops": ["max", "min"],
          "fields": ["temp_max", "temp_min"],
          "as": ["max_temp_max", "min_temp_min"]
        }
      ]
    }
  ],
  "marks": [
    {
      "name": "marks",
      "type": "area",
      "style": ["area"],
      "sort": {"field": "datum[\"monthdate_date\"]"},
      "from": {"data": "source_0"},
      "encode": {
        "update": {
          "orient": {"value": "vertical"},
          "fill": {"value": "#4c78a8"},
          "opacity": {"value": 0.7},
          "description": {
            "signal": "\"Date: \" + (timeFormat(datum[\"monthdate_date\"], '%b')) + \"; Daily Temperature Range (C): \" + (format(datum[\"max_temp_max\"], \"\")) + \"; Min of temp_min: \" + (format(datum[\"min_temp_min\"], \"\"))"
          },
          "x": {"scale": "x", "field": "monthdate_date"},
          "y": {"scale": "y", "field": "max_temp_max"},
          "y2": {"scale": "y", "field": "min_temp_min"},
          "defined": {
            "signal": "isValid(datum[\"monthdate_date\"]) && isFinite(+datum[\"monthdate_date\"]) && isValid(datum[\"max_temp_max\"]) && isFinite(+datum[\"max_temp_max\"])"
          }
        }
      }
    }
  ],
  "scales": [
    {
      "name": "x",
      "type": "time",
      "domain": {"data": "source_0", "field": "monthdate_date"},
      "range": [0, {"signal": "width"}]
    },
    {
      "name": "y",
      "type": "linear",
      "domain": {
        "data": "source_0",
        "fields": ["max_temp_max", "min_temp_min"]
      },
      "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": "Date",
      "format": "%b",
      "labelFlush": true,
      "labelOverlap": true,
      "tickCount": {"signal": "ceil(width/40)"},
      "zindex": 0
    },
    {
      "scale": "y",
      "orient": "left",
      "grid": false,
      "title": "Daily Temperature Range (C)",
      "labelOverlap": true,
      "tickCount": {"signal": "ceil(height/40)"},
      "zindex": 0
    }
  ]
}