bar_argmax_transform.vg.json

{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "description": "The production budget of the movie that has the highest US Gross in each major genre.",
  "background": "white",
  "padding": 5,
  "width": 200,
  "style": "cell",
  "data": [
    {
      "name": "source_0",
      "url": "data/movies.json",
      "format": {"type": "json"},
      "transform": [
        {
          "type": "aggregate",
          "groupby": ["Major Genre"],
          "ops": ["argmax"],
          "fields": ["US Gross"],
          "as": ["argmax_US_Gross"]
        },
        {
          "type": "formula",
          "expr": "datum[\"argmax_US_Gross\"] && datum[\"argmax_US_Gross\"][\"Production Budget\"]",
          "as": "argmax_US_Gross.Production Budget"
        },
        {
          "type": "stack",
          "groupby": ["Major Genre"],
          "field": "argmax_US_Gross\\.Production Budget",
          "sort": {"field": [], "order": []},
          "as": [
            "argmax_US_Gross.Production Budget._start",
            "argmax_US_Gross.Production Budget._end"
          ],
          "offset": "zero"
        },
        {
          "type": "filter",
          "expr": "isValid(datum[\"argmax_US_Gross.Production Budget\"]) && isFinite(+datum[\"argmax_US_Gross.Production Budget\"])"
        }
      ]
    }
  ],
  "signals": [
    {"name": "y_step", "value": 20},
    {
      "name": "height",
      "update": "bandspace(domain('y').length, 0.1, 0.05) * y_step"
    }
  ],
  "marks": [
    {
      "name": "marks",
      "type": "rect",
      "style": ["bar"],
      "from": {"data": "source_0"},
      "encode": {
        "update": {
          "fill": {"value": "#4c78a8"},
          "ariaRoleDescription": {"value": "bar"},
          "description": {
            "signal": "\"argmax_US_Gross['Production Budget']: \" + (format(datum[\"argmax_US_Gross.Production Budget\"], \"\")) + \"; Major Genre: \" + (isValid(datum[\"Major Genre\"]) ? datum[\"Major Genre\"] : \"\"+datum[\"Major Genre\"])"
          },
          "x": {
            "scale": "x",
            "field": "argmax_US_Gross\\.Production Budget\\._end"
          },
          "x2": {
            "scale": "x",
            "field": "argmax_US_Gross\\.Production Budget\\._start"
          },
          "y": {"scale": "y", "field": "Major Genre"},
          "height": {"signal": "max(0.25, bandwidth('y'))"}
        }
      }
    }
  ],
  "scales": [
    {
      "name": "x",
      "type": "linear",
      "domain": {
        "data": "source_0",
        "fields": [
          "argmax_US_Gross\\.Production Budget\\._start",
          "argmax_US_Gross\\.Production Budget\\._end"
        ]
      },
      "range": [0, {"signal": "width"}],
      "nice": true,
      "zero": true
    },
    {
      "name": "y",
      "type": "band",
      "domain": {"data": "source_0", "field": "Major Genre", "sort": true},
      "range": {"step": {"signal": "y_step"}},
      "paddingInner": 0.1,
      "paddingOuter": 0.05
    }
  ],
  "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": "x",
      "orient": "bottom",
      "grid": false,
      "title": "argmax_US_Gross['Production Budget']",
      "labelFlush": true,
      "labelOverlap": true,
      "tickCount": {"signal": "ceil(width/40)"},
      "zindex": 0
    },
    {
      "scale": "y",
      "orient": "left",
      "grid": false,
      "title": "Major Genre",
      "zindex": 0
    }
  ],
  "config": {"style": {"tick": {"discreteBandSize": {"band": 0.75}}}}
}