{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "description": "Showing sum of distance traveled for each 5-minute interval.",
  "background": "white",
  "padding": 5,
  "width": 200,
  "height": 200,
  "style": "cell",
  "data": [
    {
      "name": "source_0",
      "values": [
        {"date": "Sun, 01 Jan 2012 00:00:00", "distance": 1},
        {"date": "Sun, 01 Jan 2012 00:01:00", "distance": 1},
        {"date": "Sun, 01 Jan 2012 00:02:00", "distance": 2},
        {"date": "Sun, 01 Jan 2012 00:03:00", "distance": 1},
        {"date": "Sun, 01 Jan 2012 00:04:00", "distance": 4},
        {"date": "Sun, 01 Jan 2012 00:05:00", "distance": 2},
        {"date": "Sun, 01 Jan 2012 00:06:00", "distance": 5},
        {"date": "Sun, 01 Jan 2012 00:07:00", "distance": 2},
        {"date": "Sun, 01 Jan 2012 00:08:00", "distance": 6},
        {"date": "Sun, 01 Jan 2012 00:09:00", "distance": 4},
        {"date": "Sun, 01 Jan 2012 00:10:00", "distance": 1},
        {"date": "Sun, 01 Jan 2012 00:11:00", "distance": 1},
        {"date": "Sun, 01 Jan 2012 00:12:00", "distance": 3},
        {"date": "Sun, 01 Jan 2012 00:13:00", "distance": 0},
        {"date": "Sun, 01 Jan 2012 00:14:00", "distance": 2},
        {"date": "Sun, 01 Jan 2012 00:15:00", "distance": 3}
      ]
    },
    {
      "name": "data_0",
      "source": "source_0",
      "transform": [
        {"type": "formula", "expr": "toDate(datum[\"date\"])", "as": "date"},
        {
          "field": "date",
          "type": "timeunit",
          "units": ["minutes"],
          "step": 5,
          "as": ["minutes_step_5_date", "minutes_step_5_date_end"]
        },
        {
          "type": "aggregate",
          "groupby": ["minutes_step_5_date", "minutes_step_5_date_end"],
          "ops": ["sum"],
          "fields": ["distance"],
          "as": ["sum_distance"]
        },
        {
          "type": "filter",
          "expr": "(isDate(datum[\"minutes_step_5_date\"]) || (isValid(datum[\"minutes_step_5_date\"]) && isFinite(+datum[\"minutes_step_5_date\"]))) && isValid(datum[\"sum_distance\"]) && isFinite(+datum[\"sum_distance\"])"
        }
      ]
    }
  ],
  "marks": [
    {
      "name": "marks",
      "type": "rect",
      "style": ["bar"],
      "from": {"data": "data_0"},
      "encode": {
        "update": {
          "fill": {"value": "#4c78a8"},
          "ariaRoleDescription": {"value": "bar"},
          "description": {
            "signal": "\"date (minutes): \" + (timeFormat(datum[\"minutes_step_5_date\"], timeUnitSpecifier([\"minutes\"], {\"year-month\":\"%b %Y \",\"year-month-date\":\"%b %d, %Y \"}))) + \"; Sum of distance: \" + (format(datum[\"sum_distance\"], \"\"))"
          },
          "x2": {"scale": "x", "field": "minutes_step_5_date", "offset": 1},
          "x": {"scale": "x", "field": "minutes_step_5_date_end"},
          "y": {"scale": "y", "field": "sum_distance"},
          "y2": {"scale": "y", "value": 0}
        }
      }
    }
  ],
  "scales": [
    {
      "name": "x",
      "type": "time",
      "domain": {
        "data": "data_0",
        "fields": ["minutes_step_5_date", "minutes_step_5_date_end"]
      },
      "range": [0, {"signal": "width"}]
    },
    {
      "name": "y",
      "type": "linear",
      "domain": {"data": "data_0", "field": "sum_distance"},
      "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 (minutes)",
      "format": {
        "signal": "timeUnitSpecifier([\"minutes\"], {\"year-month\":\"%b %Y \",\"year-month-date\":\"%b %d, %Y \"})"
      },
      "labelFlush": true,
      "labelOverlap": true,
      "tickCount": {"signal": "ceil(width/40)"},
      "zindex": 0
    },
    {
      "scale": "y",
      "orient": "left",
      "grid": false,
      "title": "Sum of distance",
      "labelOverlap": true,
      "tickCount": {"signal": "ceil(height/40)"},
      "zindex": 0
    }
  ]
}