Pie chart diagrams

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A pie chart (or a circle chart) is a circular statistical graphic, which is divided into slices to illustrate numerical proportion. In a pie chart, the arc length of each slice (and consequently its central angle and area), is proportional to the quantity it represents. While it is named for its resemblance to a pie which has been sliced, there are variations on the way it can be presented. The earliest known pie chart is generally credited to William Playfair's Statistical Breviary of 1801 -Wikipedia

Mermaid can render Pie Chart diagrams.

pie title Pets adopted by volunteers
    "Dogs" : 386
    "Cats" : 85
    "Rats" : 15

pie title Pets adopted by volunteers 
    "Dogs" : 386
    "Cats" : 85
    "Rats" : 35

Syntax

Drawing a pie chart is really simple in mermaid.

Start with pie keyword to begin the diagram
Followed by title keyword and its value in string to give a title to the pie-chart. This is OPTIONAL
Followed by dataSet
- label for a section in the pie diagram within " " quotes.
- Followed by : semi-colon as separator
- Followed by positive numeric value (supported upto two decimal places)

[pie] [title] [titlevalue] (OPTIONAL)
"[datakey1]" : [dataValue1]
"[datakey2]" : [dataValue2]
"[datakey3]" : [dataValue3]
.
.

Example

pie
    title Key elements in Product X
    "Calcium" : 42.96
    "Potassium" : 50.05
    "Magnesium" : 10.01
    "Iron" :  5

pie 
title Key elements in Product X
    "Calcium" : 42.96
    "Potassium" : 50.05
    "Magnesium" : 25.01
    "Iron" :  15

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Pie chart diagrams

Syntax

Example

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