Isaac Yuen

@isaachyuen·4 public vizzes

Mouse Follower

A single gray circle tracks the mouse cursor across an SVG canvas, shifting its center position in real time to follow pointer movement. The React component manages the cursor coordinates through the `useState` hook, updating the circle's `cx` and `cy` attributes whenever the SVG's `onMouseMove` event fires. Rendered with ReactDOM, the visualization uses a fixed 960×500 viewport and a circle radius of 30 pixels, demonstrating simple state-driven interaction within a declarative UI framework.

Apr 28, 2022

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Loading and Parsing CSV Data

This example demonstrates how to load and parse CSV data using the browser’s built-in Fetch API. The code fetches a remote CSV file containing named CSS colors and logs its raw text content to the console. It defines an asynchronous `fetchText` function that retrieves the data and returns it as a string, then calls that function on a GitHub Gist URL. The visualization itself is minimal, focusing on the data-loading step rather than any graphical rendering.

Apr 28, 2022

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Fork of Loading and Parsing CSV Data

This example demonstrates how to load and parse CSV data, displaying a summary of the dataset’s size in kilobytes, row count, and column count. It fetches CSS named colors from a GitHub gist and processes the data using `d3.csv` with promises in D3 v5. The code includes commented alternatives using `fetch`, `async`/`await`, and `d3.csvParse`, illustrating different asynchronous approaches. The result updates a plain text element, showing the parsed data’s dimensions without any chart rendering.

Apr 28, 2022

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Smiley Face Part 1

A grid of eighteen smiley faces renders in React with D3 v7, each face varying randomly in stroke width, eye size and position, and mouth dimensions. The example shows how SVG shapes compose into a reusable `Face` component using D3's `arc` generator to draw each mouth. The `FaceContainer` translates a central group, while `BackgroundCircle`, `Eyes`, and `Mouth` define the facial features. Random parameters from the `d3.range` map generate the unique faces.

Apr 28, 2022