streamgraph.vg.json

{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "background": "white",
  "padding": 5,
  "width": 1000,
  "height": 500,
  "title": {
    "text": "The political history reflected by 120 years of Summer Olympics",
    "frame": "group"
  },
  "style": "cell",
  "data": [
    {
      "name": "industry_store"
    },
    {
      "name": "source_0",
      "url": "https://gist.githubusercontent.com/hawleylin/ee91d5ac3b354fb8c2b86dc23ec1ba46/raw/e40571b90b09469a1ca7e771bb8dcbe1b3373156/medal_country&continent.csv",
      "format": {
        "type": "csv",
        "parse": {
          "year": "date"
        },
        "delimiter": ","
      },
      "transform": [
        {
          "field": "year",
          "type": "timeunit",
          "units": [
            "year"
          ],
          "step": 4,
          "as": [
            "year_step_4_year",
            "year_step_4_year_end"
          ]
        },
        {
          "type": "formula",
          "expr": "datum[\"country\"]===\"USA\" ? 0 : datum[\"country\"]===\"Soviet Union\" ? 1 : datum[\"country\"]===\"Russia\" ? 2 : datum[\"country\"]===\"China\" ? 3 : datum[\"country\"]===\"Japan\" ? 4 : datum[\"country\"]===\"West Germany\" ? 5 : datum[\"country\"]===\"East Germany\" ? 6 : datum[\"country\"]===\"Germany\" ? 7 : datum[\"country\"]===\"Australia\" ? 8 : datum[\"country\"]===\"France\" ? 9 : datum[\"country\"]===\"Italy\" ? 10 : datum[\"country\"]===\"UK\" ? 11 : datum[\"country\"]===\"Other Countries in Americas\" ? 12 : datum[\"country\"]===\"Other Countries in Asia\" ? 13 : datum[\"country\"]===\"Other Countries in Europe\" ? 14 : datum[\"country\"]===\"Other Countries in Oceania\" ? 15 : datum[\"country\"]===\"Africa\" ? 16 : 17",
          "as": "color_country_sort_index"
        }
      ]
    },
    {
      "name": "data_0",
      "source": "source_0",
      "transform": [
        {
          "type": "aggregate",
          "groupby": [
            "year_step_4_year",
            "country"
          ],
          "ops": [
            "sum"
          ],
          "fields": [
            "medal"
          ],
          "as": [
            "sum_medal"
          ]
        },
        {
          "type": "impute",
          "field": "sum_medal",
          "groupby": [
            "country"
          ],
          "key": "year_step_4_year",
          "method": "value",
          "value": 0
        },
        {
          "type": "stack",
          "groupby": [
            "year_step_4_year"
          ],
          "field": "sum_medal",
          "sort": {
            "field": [
              "country"
            ],
            "order": [
              "descending"
            ]
          },
          "as": [
            "sum_medal_start",
            "sum_medal_end"
          ],
          "offset": "center"
        }
      ]
    }
  ],
  "signals": [
    {
      "name": "unit",
      "value": {},
      "on": [
        {
          "events": "mousemove",
          "update": "isTuple(group()) ? group() : unit"
        }
      ]
    },
    {
      "name": "industry_country_legend",
      "value": null,
      "on": [
        {
          "events": [
            {
              "source": "view",
              "type": "click",
              "markname": "country_legend_symbols"
            },
            {
              "source": "view",
              "type": "click",
              "markname": "country_legend_labels"
            },
            {
              "source": "view",
              "type": "click",
              "markname": "country_legend_entries"
            }
          ],
          "update": "datum.value || item().items[0].items[0].datum.value",
          "force": true
        },
        {
          "events": [
            {
              "source": "view",
              "type": "click"
            }
          ],
          "update": "!event.item || !datum ? null : industry_country_legend",
          "force": true
        }
      ]
    },
    {
      "name": "industry",
      "update": "vlSelectionResolve(\"industry_store\", \"union\", true)"
    },
    {
      "name": "industry_tuple",
      "update": "industry_country_legend !== null ? {fields: industry_tuple_fields, values: [industry_country_legend]} : null"
    },
    {
      "name": "industry_tuple_fields",
      "value": [
        {
          "type": "E",
          "field": "country"
        }
      ]
    },
    {
      "name": "industry_toggle",
      "value": false,
      "on": [
        {
          "events": {
            "merge": [
              {
                "source": "view",
                "type": "click"
              }
            ]
          },
          "update": "event.shiftKey"
        }
      ]
    },
    {
      "name": "industry_modify",
      "on": [
        {
          "events": {
            "signal": "industry_tuple"
          },
          "update": "modify(\"industry_store\", industry_toggle ? null : industry_tuple, industry_toggle ? null : true, industry_toggle ? industry_tuple : null)"
        }
      ]
    }
  ],
  "marks": [
    {
      "name": "pathgroup",
      "type": "group",
      "from": {
        "facet": {
          "name": "faceted_path_main",
          "data": "data_0",
          "groupby": [
            "country"
          ]
        }
      },
      "encode": {
        "update": {
          "width": {
            "field": {
              "group": "width"
            }
          },
          "height": {
            "field": {
              "group": "height"
            }
          }
        }
      },
      "marks": [
        {
          "name": "marks",
          "type": "area",
          "style": [
            "area"
          ],
          "sort": {
            "field": "datum[\"year_step_4_year\"]"
          },
          "interactive": true,
          "from": {
            "data": "faceted_path_main"
          },
          "encode": {
            "update": {
              "orient": {
                "value": "vertical"
              },
              "fill": {
                "scale": "color",
                "field": "country"
              },
              "opacity": [
                {
                  "test": "!(length(data(\"industry_store\"))) || (vlSelectionTest(\"industry_store\", datum))",
                  "value": 1
                },
                {
                  "value": 0.2
                }
              ],
              "description": {
                "signal": "\"Year\" + \": \" + (timeFormat(datum[\"year_step_4_year\"], timeUnitSpecifier([\"year\"], {\"year-month\":\"%b %Y \",\"year-month-date\":\"%b %d, %Y \"}))) + \"; \" + \"Sum of medal\" + \": \" + (format(datum[\"sum_medal\"], \"\")) + \"; \" + \"Country&Continent\" + \": \" + (isValid(datum[\"country\"]) ? datum[\"country\"] : \"\"+datum[\"country\"])"
              },
              "x": {
                "scale": "x",
                "field": "year_step_4_year"
              },
              "y": {
                "scale": "y",
                "field": "sum_medal_end"
              },
              "y2": {
                "scale": "y",
                "field": "sum_medal_start"
              },
              "defined": {
                "signal": "isValid(datum[\"year_step_4_year\"]) && isFinite(+datum[\"year_step_4_year\"]) && isValid(datum[\"sum_medal\"]) && isFinite(+datum[\"sum_medal\"])"
              }
            }
          }
        }
      ]
    }
  ],
  "scales": [
    {
      "name": "x",
      "type": "time",
      "domain": {
        "data": "data_0",
        "field": "year_step_4_year"
      },
      "range": [
        0,
        {
          "signal": "width"
        }
      ]
    },
    {
      "name": "y",
      "type": "linear",
      "domain": {
        "data": "data_0",
        "fields": [
          "sum_medal_start",
          "sum_medal_end"
        ]
      },
      "range": [
        {
          "signal": "height"
        },
        0
      ],
      "nice": true,
      "zero": true
    },
    {
      "name": "color",
      "type": "ordinal",
      "domain": {
        "data": "source_0",
        "field": "country",
        "sort": {
          "op": "min",
          "field": "color_country_sort_index"
        }
      },
      "range": {
        "scheme": "category20b"
      }
    }
  ],
  "axes": [
    {
      "scale": "x",
      "orient": "bottom",
      "grid": false,
      "title": "Year",
      "domain": true,
      "tickCount": {
        "interval": "year",
        "step": 4
      },
      "tickSize": 8,
      "format": {
        "signal": "timeUnitSpecifier([\"year\"], {\"year-month\":\"%b %Y \",\"year-month-date\":\"%b %d, %Y \"})"
      },
      "labelFlush": true,
      "labelOverlap": true,
      "zindex": 0
    }
  ],
  "legends": [
    {
      "title": "Country&Continent",
      "fill": "color",
      "symbolType": "circle",
      "encode": {
        "labels": {
          "name": "country_legend_labels",
          "interactive": true,
          "update": {
            "opacity": [
              {
                "test": "(!length(data(\"industry_store\")) || (industry[\"country\"] && indexof(industry[\"country\"], datum.value) >= 0))",
                "value": 1
              },
              {
                "value": 0.35
              }
            ]
          }
        },
        "symbols": {
          "name": "country_legend_symbols",
          "interactive": true,
          "update": {
            "opacity": [
              {
                "test": "(!length(data(\"industry_store\")) || (industry[\"country\"] && indexof(industry[\"country\"], datum.value) >= 0))",
                "value": 1
              },
              {
                "value": 0.35
              }
            ]
          }
        },
        "entries": {
          "name": "country_legend_entries",
          "interactive": true,
          "update": {
            "fill": {
              "value": "transparent"
            }
          }
        }
      }
    }
  ],
  "config": {}
}