Public
Edited
Jul 25, 2023
// Import D3.js library in ObservableHQ platform
import {d3} from "https://unpkg.com/d3@5/dist/d3.min.js"
let data = {
"name": "root",
"children": [
{"name": "Ping", "value": 704466319},
{"name": "NTP", "value": 2681492},
{"name": "DNS", "value": 219150484},
{"name": "SSL Cert", "value": 2812316},
{"name": "Traceroute", "value": 200526895},
{"name": "HTTP", "value": 75130906}
]
};
// Define dimensions
let width = 700;
let height = 500;
// Create a color scale
let color = d3.scaleOrdinal(d3.schemeCategory10);
// Define the treemap layout
let layout = d3.treemap()
.size([width, height])
.paddingInner(1);
// Create a root node
let root = d3.hierarchy(data).sum(function(d) { return d.value; });
layout(root);
// Create an SVG element
let svg = d3.select('body').append('svg')
.attr('width', width)
.attr('height', height);
// Add rectangles
svg.selectAll('rect')
.data(root.leaves())
.enter()
.append('rect')
.attr('x', function(d) { return d.x0; })
.attr('y', function(d) { return d.y0; })
.attr('width', function(d) { return d.x1 - d.x0; })
.attr('height', function(d) { return d.y1 - d.y0; })
.style('stroke', 'black')
.style('fill', function(d) { return color(d.data.name); });
// Add labels
svg.selectAll('text')
.data(root.leaves())
.enter()
.append('text')
.attr('x', function(d) { return d.x0+5; }) // +10 to adjust position (more right)
.attr('y', function(d) { return d.y0+20; }) // +20 to adjust position (lower)
.text(function(d) { return d.data.name + '\n' + d.data.value; })
.attr('font-size', '15px')
.attr('fill', 'white');
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