Template:Graph:Pie from row

Template documentation

Pie chart

You can add a pie chart with a call to this template.

Examples

Example usage:

{{Graph:Pie from row
| table = Bea.gov/GDP by state.tab
| rowtest = year==2015
| series = "TX","CA","NY"
| show = label
| legend = Relative GDP
| radius = 125
}}

{{Graph:Pie from row
| table = Bea.gov/GDP by state.tab
| rowtest = year==2015
| series = "AL","AK","AZ","AR","CA","CO","CT","DE","DC","FL","GA","HI","ID","IL","IN","IA","KS","KY","LA","ME","MD","MA","MI","MN","MS","MO","MT","NE","NV","NH","NJ","NM","NY","NC","ND","OH","OK","OR","PA","RI","SC","SD","TN","TX","UT","VT","VA","WA","WV","WI","WY"
| legend = -
| radius = 125
}}

See or edit source data.

Template Data

This template adds a pie chart to the page using Graph extension

Template parameters[Edit template data]
This template prefers inline formatting of parameters.
Parameter		Description	Type	Status
table	`table`	Data page name on Commons, without the Data: prefix. The table should contain series columns to plot, and the rowtest to select which row to use Example bea.gov/GDP by state.tab	Unknown	required
series	`series`	Data page name on Commons, without the Data: prefix. The table should contain xField column, like year or date, and one or more series columns to plot	String	required
rowtest	`rowtest`	a condition to select just one row of the data for the display Example year==2015	String	required
Radius	`radius`	Specify the radius of the pie in number of pixels Default 100 Example 100	Number	suggested
Legend Title	`legend`	The title that will appear above the legend, or '-' to hide it Default "Legend" Example "Fruits"	String	suggested
The colors of the slices	`colors`	The colors of the slices, specified as Vega defined rangeliteral. This can also be a list like [ "red", "green" ] Default "category10" Example "category10"	String	optional
show	`show`	Show "label", "value" or "both" inside the pie chart	String	optional
title	`title`	Optional title for the graph	String	optional
debug	`debug`	no description	Unknown	optional

<graph>

{
  //
  // ATTENTION: This code is maintained at https://www.mediawiki.org/wiki/Template:Graph:Pie_from_row
  //            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_talk:Graph:Pie_from_row
  //
  // Template translation is in https://commons.wikimedia.org/wiki/Data:Original/Template:Graphs.tab
  //

  "version": 2,
  "width": 100, "height": 100, "padding": "auto",
"legends": [{"title": "Legend","fill": "color"}],
  "data": [{
      "name": "table",
      "url": "tabular:///Bea.gov/GDP by state.tab",
      "format": {"type": "json", "property": "data"},
      "transform": [

        {"type": "fold", "fields": []},
        {"type": "pie", "field": "value"}
      ]
  },
  {
    "name": "labels",
    "url": "tabular:///Bea.gov/GDP by state.tab",
    "format": {"type": "json", "property": "fields"}
  }],
  "scales": [{
      "name": "color",
      "type": "ordinal",
      "range": "category10",
      "domain": {"data": "table", "field": "key"},
  }],
  "marks": [
    {
      "type": "arc",
      "from": { "data": "table" },
      "properties": {
        "enter": {
          "fill": {"field": "key", "scale": "color"},
          "stroke": {"value": "white"},
          "startAngle": {"field": "layout_start"},
          "endAngle": {"field": "layout_end"},
          "outerRadius": {"value": 100 },
        }
      }
    },

    {
      // This mark draws labels around the pie chart after the pie chart has been drawn
      "type": "text",
      // Before drawing, we need to perform a number of calculations to figure out the exact location and orientation of the text
      "from": {
        "data": "table",
        "transform": [
          // For each data point (datum), each of these transformations will be ran in order.
          // Formula transformation evaluates the expression and assigns result to the datapoint
          // Size of the pie slice, in degrees:  sliceSize = (end - start) * 180 / Pi
          { "type": "formula", "field": "sliceSize", "expr": "(datum.layout_end - datum.layout_start)*180/PI" },
          // Draw text only if the slice of the arc is more than 2 degrees to avoid overcrowding
          { "type": "filter", "test": "datum.sliceSize > 9" },
          // Format percentage as a string
          { "type": "formula", "field": "prcStr", "expr": "format('.0%',datum.sliceSize/360)" },
          { "type": "formula", "field": "title", "expr": "datum.key+' '+datum.prcStr" },
          // Determine the side of the pie chart we are on - left or right.
          { "type": "formula", "field": "invert", "expr": "datum.layout_mid*180/PI < 180 ? 1 : -1" },
          // If on the left, the text should be right-aligned (go from the rim inward)
          { "type": "formula", "field": "align", "expr": "datum.invert < 0 ? 'left' : 'right'" },
          // At what angle should the text be drawn relative to the point on the circle
          { "type": "formula", "field": "angle", "expr": "(datum.layout_mid*180/PI)-90*datum.invert" },
          // Make font smaller for smaller pie slices
          { "type": "formula", "field": "fontSize", "expr": "datum.sliceSize > 20 ? 15 : (datum.sliceSize > 13 ? 12 : 9)" },
          // Make font bold for largest pie slices 
          { "type": "formula", "field": "fontWeight", "expr": "datum.sliceSize > 15 ? 'bold' : 'normal'" }
        ]
      },
      "properties": {
        "enter": {
          // Use the fields calculated in the transformation to draw category names
          "align": {"value": "center"},
          "angle": {"field": "angle"},
          "baseline": {"value": "middle"},
          "fill": {"value": "black"},
          "fontSize": {"field": "fontSize"},
          "fontWeight": {"field": "fontWeight"},
          "radius": {"value": 100, "offset": -30},
          "text": {"field": "title"},
          "theta": {"field": "layout_mid"}
        }
      }
    }


  ]
}

</graph>