D3: Adding and removing values from a chart (dynamic labels included)

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D3: Adding and removing values from a chart (dynamic labels included)

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Last edited Aug 2, 2016

Created on Aug 2, 2016

This example shows a bar chart where clicking the “Add” or “Remove” text buttons appends or removes a data value, with bars and their numeric labels animating to updated positions. Built with D3 v4, it uses `d3.scaleBand` and `d3.scaleLinear` for axes, a key function on `d.key` for data binding, and `selection.merge` with `transition` to smoothly shift rectangles and text over 500 milliseconds. Entering elements slide in from the right, while exiting ones slide out left before being removed.

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