fresh block
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BBrieLewis
Last edited Feb 16, 2017
Created on Feb 16, 2017
A horizontal bar chart displays categorical data as colored rectangles, where each bar's length corresponds to a numeric range (start to stop) and its color and vertical position encode an orientation (forward or reverse). The visualization uses D3 v4 to load JSON data via `d3.json`, bind it to SVG `rect` elements, and set attributes like `x`, `width`, `y`, and `fill` based on the data values. Forward-oriented bars appear in aqua on the upper row, while reverse-oriented bars are blue on the lower row, clearly separating the two categories.
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