This visualization displays a histogram of kW and kVAR measurements from the MFRED dataset, with individual aggregates (AG01 through AG26) distinguished by color. The bars are rendered using the vega-lite-api’s markBar with a black background and configured axes. The data is loaded via d3.csv from a GitHub-hosted CSV file, then grouped by hour using d3.group to compute totals. The chart uses D3 v5, Vega-Lite v4, and the vega-lite-api wrapper, with a custom tooltip handler for interactivity.