Loading and Parsing CSV Data

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Loading and Parsing CSV Data

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Last edited May 20, 2022

Created on May 19, 2022

This example demonstrates how to load and parse CSV data by fetching a remote file from GitHub Gist and displaying its basic characteristics—file size in kilobytes, row count, and column count—as large text in the browser. It uses d3.csv to asynchronously fetch and parse the data, then formats the result with d3.csvFormat to calculate size. Alternative approaches using fetch, async/await, and d3.csvParse are commented out for comparison. The code relies on D3 v7 and a minimal HTML structure with a pre element for output.

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A bare minimum HTML page demonstrating use of CSS and JavaScript.

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