D3: Adding values and elements to a chart

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D3: Adding values and elements to a chart

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Last edited Jun 25, 2017

Created on Jun 22, 2017

This chart displays a dataset of twenty-one coordinate pairs plotted as circles on an SVG canvas. It shows how values and visual elements can be dynamically added and transformed. The example uses D3 v4, implementing scales via `d3.scaleLinear`, axes drawn with `d3.axisBottom` and `d3.axisLeft`, and circles created through `.enter()`. A button triggers a repeating transition animation: the circles swap their x and y coordinates—changing from green to blue and back—using D3 `.transition()`, `.duration()`, and `.delay()` for a sequential, looping effect.

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