Pie Chart Update, III

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Pie Chart Update, III

✓ Published0🌍 Public

Last edited Feb 9, 2016

Created on May 30, 2013

A pie chart with a donut layout transitions between two datasets, apples and oranges, loaded from a TSV file. The view shows the same arcs morphing between different values, with missing entries treated as zero to maintain object constancy. Two radio buttons switch the active dataset, triggering a 750-millisecond arc tween using D3’s `transition.attrTween` and `d3.interpolate`, which updates the stored angles in `_current`. The chart uses D3 v3’s `d3.layout.pie`, `d3.svg.arc`, and SVG `path` elements, with a timed automatic switch to oranges after two seconds.

AI-generated description

The easiest way to transition between pie charts with differently-sized datasets (while maintaining object constancy) is to set the missing values to zero.

function type(d) {
  d.apples = +d.apples || 0;
  d.oranges = +d.oranges || 0;
  return d;
}

Next: Static Data-Join<br> Previous: Animation

gpl-3.0 Licensed

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