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Format:Graph:Stacked

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<graph>
{
  //
  // ATTENTION: This code is maintained at https://www.mediawiki.org/wiki/Template:Graph:Stacked
  //            Please do not modify it anywhere else, as it may get copied and override your changes.
  //            Suggestions can be made at https://www.mediawiki.org/wiki/Template:Graph:Stacked
  //
  // Template translation is in https://commons.wikimedia.org/wiki/Data:Original/Template:Graphs.tab
  //

  "version": 2,
  "width": 550,
  "height": 250,

  "data": [{
    "name": "chart",

"url": "tabular:///{{{table}}}",
    "format": {"type": "json"
, "property": "data"

    },
    "transform": [
      // Convert xField parameter into a field "_xfield"
      {"type": "formula", "field": "_xfield", "expr":
"datum.{{{xField}}}"
      },
      {"type": "sort", "by": ["_xfield"]},

      // For non-bar graph, ensure that all missing values still present as zeros to avoid area breaks
      // We might need to allow other, non-0 values to be imputed.
{
        "type": "impute",
        "groupby": ["key"],
        "orderby": ["_xfield"],
        "field": "value",
        "method": "value",
        "value": 0
      },
    ]
  },

  {
    "name": "stats",
    "source": "chart",
    "transform": [{
      "type": "aggregate",
      "groupby": ["_xfield"],
      "summarize": [{"field": "value", "ops": ["sum"]}]
    }]
  }
  ],
  "scales": [
    {
      "name": "x",
      "type": "{{{type}}}",
      "domain": {"data": "chart", "field": "_xfield"},

      "range": "width",



    },
    {
      "name": "y",
      "type": "linear",
      "range": "height",
      "domain": {"data": "stats", "field": "sum_value"},



    },
    {
      "name": "color",
      "type": "ordinal",
      "domain": {"data": "chart", "field": "key"},
      "range": "category10"
    },

  ],

  "axes": [
    {"scale": "x", "type": "x", "tickSizeEnd": 0
, "ticks": 7


},
    {"scale": "y", "type": "y", "tickSizeEnd": 0
// When drawing "type=year" bars with the given width, shift y axis left by half the width




}
  ],

  "marks": [
    // Group data by the "key", and draw lines, one line per key
    {
"type": "group",
      "from": {
        "data": "chart",
        "transform": [
          {"type": "stack", "groupby": ["_xfield"], "sortby": ["key"], "field": "value"},
          {"type": "facet", "groupby": ["key"]}
        ]
      },
      "marks": [
        {
          "type": "area",
          "properties": {
            "enter": {
              "x": {"scale": "x", "field": "_xfield"},
              "y": {"scale": "y", "field": "layout_start"},
              "y2": {"scale": "y", "field": "layout_end"},
              "fill": {"scale": "color", "field": "key"},
              "interpolate": {"value": "monotone"}
            }
          }
        }
      ],
    }


  ]
}
</graph>