Published
Edited
Feb 1, 2020
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2 stars
/*links = data.forEach(function(link) {
link.source = {name: link["Thing A"], type : link["Thing A Type"]};
link.target = {name: link["Thing B"], type : link["Thing B Type"]};
link.relationship = link["Relation"];
return link;
});
*/
chart = {
//const links = data.links.map(d => Object.create(d));
//const nodes = data.nodes.map(d => Object.create(d));
//var bodyForce = d3.forceManyBody
const simulation = d3.forceSimulation(nodes)
.force("link", d3.forceLink(links).id(d => d.name))
.force("charge", d3.forceManyBody().strength(-60).distanceMax(250))
//.force("charge", d3.forceManyBody())
.force("center", d3.forceCenter(width / 2, height / 2));
const svg = d3.create("svg")
.attr("viewBox", [0, 0, width, height]);
const link = svg.append("g")
.attr("stroke", "#999")
.attr("stroke-opacity", 0.6)
.selectAll("line")
.data(links)
.join("line")
.attr("stroke-width", d => Math.sqrt(d.value));
const node = svg.append("g")
.selectAll(".node")
.data(nodes)
.join("g")
.attr('class', 'node')
.call(drag(simulation));
var radius = 4;
node.append('circle')
.attr("r", 8)
.attr("fill", function(d) {return statusColor(d.readStatus);});
node.append("text")
.text(function(d) {
return d.name;
})
.style('fill', '#000')
.style('font-size', '14px')
.style('font-family','Helvetica')
.attr('x', 9)
.attr('y', 4);
simulation.on("tick", () => {
link
.attr("x1", d => d.source.x)
.attr("y1", d => d.source.y)
.attr("x2", d => d.target.x)
.attr("y2", d => d.target.y);
node
.attr("transform", d => `translate(${d.x}, ${d.y})`)
.attr("cx", function(d) { return d.x = Math.max(radius, Math.min(width - radius, d.x)); })
.attr("cy", function(d) { return d.y = Math.max(radius, Math.min(height - radius, d.y)); });;
});
invalidation.then(() => simulation.stop());
return svg.node();
}
height = 1000
drag = simulation => {
function dragstarted(d) {
if (!d3.event.active) simulation.alphaTarget(0.3).restart();
d.fx = d.x;
d.fy = d.y;
}
function dragged(d) {
d.fx = d3.event.x;
d.fy = d3.event.y;
}
function dragended(d) {
if (!d3.event.active) simulation.alphaTarget(0);
d.fx = null;
d.fy = null;
}
return d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended);
}
md`## Load Metadata for Nodes`
metadataCsv = FileAttachment("Knowledge Network Prototyping - Thing Data@2.csv").text()
nodeMetadata = d3.csvParse(metadataCsv, d3.autoType);
nodes.forEach(function(node) {
const meta = nodeMetadata.find(metadatum => metadatum["Thing"] === node.name);
//console.log(node);
node.readStatus = meta["Read Status"];
node.readDate = meta["Read Date"];
node.category = meta["Category"];
});
// add scales for Read Status
//statusColor = d3.scaleOrdinal(d3.schemeCategory10);
statusColor = d3.scaleOrdinal(["#1f77b4","#bcbd22","#d62728"]);
statusColor.domain = statusDomain;
statusDomain = new Set(
nodeMetadata.map(function(m) {return m["Read Status"];})
);
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.
