Fifth D3 demo

100%

✓ Published1🌍 Public

Last edited Sep 18, 2020

Created on Sep 18, 2020

A line chart displays CPU utilization percentages per minute for a single server, plotted over time. The y-axis lists timestamps, while the x-axis shows CPU load on a fixed 0–100% scale. The visualization uses D3.js version 6, specifically the `select`, `scaleLinear`, `scaleBand`, `axisLeft`, `axisBottom`, `line`, and `curveBasis` APIs, to render the SVG path. Data is loaded from a CSV file with `d3.csv`, and the code comments indicate an earlier bar-chart version was replaced by this line representation.

AI-generated description

This page is intended as a demo to try the power of D3. Now with doing some charts on a CPU utilisation per minute, but incrementally switching to lines instead of bars!

MIT Licensed

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Second D3 demo

This bar chart displays CPU utilization percentages per minute for a single server, with time on the vertical axis and CPU load on the horizontal axis. Using D3 v6, the code loads data from a CSV file and renders SVG rectangles via `selectAll('rect')`. The linear scale `scaleLinear` maps CPU values from 0 to 100, while `scaleBand` positions each timestamp, with axes created using `axisLeft` and `axisBottom`.

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This example shows CPU utilization per minute for a server, displayed as a vertical bar chart where each bar represents one timestamp and its height reflects CPU percentage on a fixed 0–100 scale. The SVG rendering uses D3 v6 utilities including `csv` for data loading, `utcParse` and `utcFormat` for date handling, `scaleBand` for the x-axis, and `scaleLinear` for the y-axis. Axes are drawn with `axisLeft` and `axisTop`, while bars are appended as `rect` elements, with styling defined in an external stylesheet.

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