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Transforming Data

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SSharankumar02
Last edited Jun 18, 2023
Created on Jun 18, 2023
Forked from Hello VizHub

This example displays the average sepal length for each iris species, computed from the classic Iris dataset. It presents the result as a formatted JSON object rendered in a `<pre>` element, showing a concise text-based summary rather than a graphical chart. The visualization loads the `data.csv` file via `fetch`, parses it with `d3.csvParse`, and converts numeric string fields to numbers. It then uses `d3.flatRollup` with `d3.sum` to calculate the mean sepal length per species, and `d3.select` to update the DOM with the resulting summary.

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