Founder, designer, @techstars mentor. Creating a world with more joy, beauty and delight. Building a journaling app to quiet the inner critic.
chart = {
const simulation = d3.forceSimulation()
.force("charge", d3.forceManyBody())
.force("link", d3.forceLink().id(d => d.id))
.force("x", d3.forceX())
.force("y", d3.forceY())
.on("tick", ticked);
const svg = d3.create("svg")
.attr("viewBox", [-width / 2, -height / 2, width, height]);
const bg = svg.append("rect")
.attr("x", "-477")
.attr("y", "-400")
.attr("width", "100%")
.attr("height", "100%")
.attr("fill", "#F5F7FA");
let link = svg.append("g")
.attr("stroke", "#899BB0")
.attr("stroke-opacity", 1)
.selectAll("line");
let node = svg.append("g")
.attr("stroke", "#fff")
.attr("stroke-width", 1)
.selectAll("circle");
function ticked() {
node.attr("x", d => d.x)
.attr("y", d => d.y);
link.attr("x1", d => d.source.x+4)
.attr("y1", d => d.source.y+6.5)
.attr("x2", d => d.target.x+4)
.attr("y2", d => d.target.y+6.5);
}
invalidation.then(() => simulation.stop());
return Object.assign(svg.node(), {
update({nodes, links}) {
// Make a shallow copy to protect against mutation, while
// recycling old nodes to preserve position and velocity.
const old = new Map(node.data().map(d => [d.id, d]));
nodes = nodes.map(d => Object.assign(old.get(d.id) || {}, d));
links = links.map(d => Object.assign({}, d));
node = node
.data(nodes, d => d.id)
.join(enter => enter.append("rect")
.attr("fill", "#fff")
.attr("stroke", "#899BB0")
.attr("width", 8)
.attr("height", 13)
.attr("rx", 2)
.call(drag(simulation))
.call(node => node.append("title").text(d => d.id)));
link = link
.data(links, d => [d.source, d.target])
.join("line");
simulation.nodes(nodes);
simulation.force("link").links(links);
simulation.alpha(1).restart().tick();
ticked(); // render now!
}
});
}
update = {
const nodes = data.nodes.filter(d => contains(d, time));
const links = data.links.filter(d => contains(d, time));
chart.update({nodes, links});
}
data = JSON.parse(await FileAttachment("sfhh@4.json").text(), (key, value) => key === "start" || key === "end" ? new Date(value) : value)
times = d3.scaleTime()
.domain([d3.min(data.nodes, d => d.start), d3.max(data.nodes, d => d.end)])
.ticks(1000)
.filter(time => data.nodes.some(d => contains(d, time)))
contains = ({start, end}, time) => start <= time && time < end
height = 680
drag = simulation => {
function dragstarted(event, d) {
if (!event.active) simulation.alphaTarget(0.3).restart();
d.fx = d.x;
d.fy = d.y;
}
function dragged(event, d) {
d.fx = event.x;
d.fy = event.y;
}
function dragended(event, d) {
if (!event.active) simulation.alphaTarget(0);
d.fx = null;
d.fy = null;
}
return d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended);
}
d3 = require("d3@6")
import {swatches} from "@d3/color-legend"
import {Scrubber} from "@mbostock/scrubber"
Purpose-built for displays of data
Observable is your go-to platform for exploring data and creating expressive data visualizations. Use reactive JavaScript notebooks for prototyping and a collaborative canvas for visual data exploration and dashboard creation.
