Activity3Tutorial3.2
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This example visualizes the iris dataset as a scatter plot, mapping sepal length to the x-axis and petal length to the y-axis, with each species represented by a distinct shape from D3’s `symbolsFill` array. A legend built with the `shapeLegend` module identifies the species symbols. The code uses D3 v7 (`d3.scaleLinear`, `d3.scaleOrdinal`, `d3.extent`, `d3.symbol`) to construct scales and generate marks via the `symbolGenerator`. Data is fetched as CSV from GitHub, parsed with `d3.csvParse`, and rendered responsively to the full window size. The axes and labels are drawn through a reusable `axes` module.
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