This example demonstrates multidimensional filtering, or crossfiltering, on the Iris dataset. Four histograms, one for each flower measurement, display the data distribution in a neutral tone, with a highlighted overlay showing the subset of data that passes all active brush filters. Users brush ranges on any histogram to filter the other charts dynamically. The visualization uses D3’s `bin`, `brushX`, and `scaleLinear` for rendering, while the `d3-rosetta` library manages state and transitions.