Troy Marchesseault

@TMarche·5 public vizzes

Stylized Bar Chart

This stylized bar chart displays the top 10 most populous countries in 2020, sorted alphabetically, with a vibrant orange fill and large typography. Built with React and D3 v5, it uses `scaleBand` and `scaleLinear` to map country names and population values to SVG rectangles. The data comes from a UN Population CSV file loaded via D3’s `csv` utility. Custom tick formatting converts values to billions, and axes are rendered as separate React components.

May 15, 2023

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Refactored Bar Chart

This example presents a horizontal bar chart of country populations using React components to structure the visualization. The chart loads data from a CSV file containing 2020 UN population estimates, slicing the dataset to show the top ten countries. D3 v5 utilities handle data parsing and scale generation, with `scaleBand` for the categorical y-axis and `scaleLinear` for the quantitative x-axis. Each bar’s width corresponds to the population value, rendered as SVG rectangles within a React component hierarchy, with separate component files managing the axes and marks.

May 15, 2023

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Axes with React & D3

This example renders a horizontal bar chart of 2020 population estimates for ten countries in SVG. Data is loaded from a CSV file using `d3.csv`, and React uses `useState` and `useEffect` to manage the asynchronous fetch. D3 scales (`scaleBand`, `scaleLinear`) compute bar positions and widths, while axis ticks are generated manually from `xScale.ticks()` with rendered lines and text. The chart displays country labels on the left and value ticks below the bars.

May 15, 2023

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The Margin Convention

This example shows a horizontal bar chart of the ten most populous countries, using UN population data for 2020. The chart applies a standard margin convention using D3’s `scaleBand` for the categorical country names and `scaleLinear` for population counts, rendered as SVG rectangles inside a translated group. The visualization is built with React, which manages the loading state via `useState` and `useEffect`, while D3’s `csv` utility fetches and parses the data before it is sliced and mapped to bars.

May 15, 2023

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Pathetic Bar Chart

A horizontal bar chart displays the ten most populous countries for 2020, with bars extending from the left edge and country labels on the y-axis. The visualization loads UN population data from a CSV file using D3’s `csv` utility, then processes it with React’s `useEffect` and `useState` hooks. React renders the SVG shapes, while D3’s `scaleBand` positions the categorical y-axis and `scaleLinear` maps population values to bar widths, with `max` determining the domain extent.

May 15, 2023