IC6 Iris Dataset Scatter Plot
This scatter plot visualizes the Iris dataset, mapping petal length on the x-axis against sepal length on the y-axis, with points colored by species (setosa in blue, versicolor in red, and virginica in black). The visualization uses D3.js v6, loading data via `d3.csv` and scales with `scaleLinear`, `extent`, and `axisBottom`/`axisLeft`. The SVG rendering includes circles with fixed radius, axis labels, and margin-based layout. The code explicitly parses numeric fields and retrieves data from a GitHub gist, showing a straightforward scatter plot with categorical color encoding.