transition of bar chart
This interactive bar chart displays the top 10 U.S. states by population share for a selected age bracket, with data from 2008 Census estimates. A dropdown menu lets users switch between seven age groups, triggering animated transitions where bars reorder, resize, and update their value labels. Built with D3 v4, the visualization uses `d3.scaleBand` for the y-axis, `d3.scaleLinear` for bar widths, and chained transitions with `.duration()` to animate enter, update, and exit selections. The SVG rendering includes hover effects that change bar color to brown.
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forked from <a href='http://bl.ocks.org/highcold/'>highcold</a>'s block: <a href='http://bl.ocks.org/highcold/1f7290cc8ab6dde169bc748b4450fcdb'>transition of bar chart</a>