Aloysius

@loykid·10 public vizzes

Making a Scatterplot with D3

This example visualizes the relationship between acceleration and horsepower for cars using a scatterplot rendered as SVG. The code loads an auto-mpg CSV dataset via d3.csv, converts numeric fields, and scales the data with d3.scaleLinear. Axes are generated using d3.axisLeft and d3.axisBottom, with grid lines created by setting tickSize. The plot includes labeled axes, a title, and orange semi-transparent circles positioned using xScale and yScale based on each car’s acceleration and horsepower values.

Feb 27, 2020

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Making a Bar Chart with D3

This horizontal bar chart displays counts of different housing situations, from rough sleeping to private housing, using a CSV data source. The visualization uses D3 v5 with SVG rendering, employing `scaleLinear` for the x-axis, `scaleBand` for the categorical y-axis, and `axisLeft`/`axisBottom` for the axes. Data loads asynchronously via `csv`, then binds to rectangles with heights set by `yScale.bandwidth()` and widths proportional to each count, with maroon fills.

Feb 24, 2020

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Making a Bar Chart with D3

A bar chart displays population estimates for ten countries, with horizontal bars sorted by population size. The visualization uses D3 v5, loading data from a CSV file with `d3.csv` and scaling values with `d3.scaleLinear` and `d3.scaleBand`. Axes are generated using `d3.axisLeft` and `d3.axisBottom`, while bars are appended as SVG rectangles. The code converts population numbers to absolute counts before rendering, and the chart includes margins and a left-axis label area.

Feb 23, 2020

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Let's Make a Face with D3.js

This example uses D3.js version 5 to construct a simple face from geometric shapes on an SVG canvas. Two red circles, positioned with `cx` offsets, form the eyes, while a rotated `<rect>` serves as the mouth. The code demonstrates basic SVG manipulation using `select`, `append`, and `attr` methods within a React framework, with all shapes centered via a `g` transform based on the SVG’s dimensions.

Feb 19, 2020

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Making a Heart with D3.js

This example renders a fixed heart shape using an inline SVG path, overlaid on an HTML page via an `<object>` element that references an external SVG file. The D3.js library is imported in `index.js` to select the SVG and read its width and height attributes, though no dynamic data binding or animation is applied. The visualization demonstrates how D3 can be paired with static SVG content in a React-oriented workflow, with the heart path defined in red and black stroke styling within the SVG markup.

Feb 19, 2020

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Let's Make a Face with D3.js

This example creates a cartoon face with D3.js v5, featuring yellow circular head, eyes, eyebrows, and a mouth drawn using the `arc` generator. The eyebrows animate through chained `transition().duration()` calls on a group element, moving them downward and back. The SVG is centered using a translated `<g>` element, with dimensions set from attributes and shapes positioned via constants like `eyeSpacing` and `eyeRadius`. The code imports `select` and `arc` from D3, demonstrating basic SVG manipulation and animation in a React project.

Feb 15, 2020

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Let's Make a Face with D3.js

A yellow face with eyes, eyebrows, and a mouth is built from SVG shapes using D3.js v5. The code uses `d3.select` and `d3.arc` to construct the face, with circles for eyes and a path for the mouth. Eyebrows are rectangles that animate via `transition.attr` over two seconds, moving up and down. The rendering is SVG-based, centered in a 960×500 viewport, with static geometry defined by numeric constants.

Feb 14, 2020

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Shapes with SVG and CSS

This example displays a static composition of basic SVG shapes—circles, rectangles, lines, and a path—arranged within a scaled and translated group. The code uses plain SVG elements to draw the shapes, while CSS classes (`.lines`) apply stroke styling, including a customized stroke-linejoin for the path. React is listed as the framework, though the provided markup is a standalone HTML page with an external stylesheet. The visualization demonstrates how SVG attributes like `fill`, `stroke`, and `transform` combine with CSS rules to control appearance, showing both default and overridden style properties.

Feb 12, 2020

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Shapes with SVG and CSS

This example demonstrates the use of SVG and CSS for styling shapes, highlighting how CSS selectors can apply presentation rules to SVG elements. The visualization is a functional, empty page that sets a monospace font and defines a class called `.highlighted` that turns text red, but no visual content is rendered. It uses a minimal HTML structure linking to a stylesheet, without any JavaScript libraries or data sources. The display is static, focusing purely on foundational SVG and CSS integration rather than interactive or data-driven graphics.

Feb 10, 2020

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Cars Report

This example demonstrates a simple text-based report of used cars, filtering a static JSON dataset to display only vehicles priced under $2,000. It shows how asynchronous JavaScript loads data with a simulated delay via `Promise` and `setTimeout`, then formats each car’s year, make, model, and price into a readable string. The code uses `getCars()` to fetch the inline JSON array, `generateReport()` with `filter` and `map` to process entries, and a custom `formatCar` function to build the output, which is inserted into an HTML `<pre>` element. The visualization relies on standard JavaScript object manipulation and module exports, with no external charting libraries.

Feb 10, 2020