This example shows the distribution of docked bikes across California stations in 2013, with a control to adjust the histogram’s bin count from 2 to 40 in steps of 3. The chart uses D3’s `d3.bin` (with `value`, `domain`, and `thresholds` based on `x.ticks(numBins)`) to compute bins from a CSV loaded via `d3.csv`, then renders bars as SVG `rect` elements on a linear scale. Animated transitions via D3’s `transition` API update the y-axis and bar heights when the bin number changes, while the x-axis remains fixed to the full data domain.