This interactive example visualizes the classic Iris dataset using bar charts rendered with D3.js v5. The code loads data from a CSV file, converts the sepal and petal measurements to numbers, and uses `d3.csv` and `d3.scaleLinear` to map values. It draws rectangular SVG elements for each data point with fixed width and height attributes, creating a grid of bars that represent the dataset's samples. The visualization demonstrates basic D3 data binding with `selectAll`, `data`, and `enter` selections.