Global temperature trendsBeeswarm, Log ScaleContoursDensity contoursBubble chart componentCircle packing componentExploring Data with Vega-LiteStreaming data into VegaVega-Lite Line ChartBrushable scatterplotVega-Lite ScatterplotNight Skies — Lights and Light Pollution WebGL GlobePhysics based t-SNEGraphvizRidgeline plotZoomable sunburstHierarchical edge bundlingMethods of Comparison, ComparedChord diagramA Guide to Guides: Axes & Legends in VegaPSR B1919+21HexbinStacked-to-grouped barsTree of LifeHeat indexMarimekkoVizsla and Vega-LiteDirectly labelling linesParallel coordinatesCollapsible treeTangled tree visualizationMarey’s TrainsWorld History TimelineSmall multiple chart cartogramThe Real MVP in the NBAAnimated treemapDensity Contour Matrix with BrushingStars and constellationsHertzsprung–Russell diagramThe Coronavirus landscapeGitHub BurndownCandlestick ChartConcentration values vs. TimeA few days of CO2 levels in my homeIrregular bins histogramELD ViewerDistributions and summary statistics - a collection of Plot examplesMermaidBivariate Bubble MapD3 galleryCalendarStacked bar chartDot plotConnected scatterplotCandlestick chartHistogramForce-directed graphDisjoint force-directed graphIndex chartSankey diagramLine chart, percent changeStacked area chartBubble chartArea chartHorizontal bar chartRadial tidy treeCircle packingIcicleStreamgraphTidy treeCluster treeSunburstHorizon chartBox plotScatterplotDifference chartBand chartBar chart transitionsTreemapLine chart, multiple seriesScatterplot matrixBrushable scatterplot matrixPlayfair's Wheat and Wages
Zoomable circle packing
chart = {
// Specify the chart’s dimensions.
const width = 928;
const height = width;
// Create the color scale.
const color = d3.scaleLinear()
.domain([0, 5])
.range(["hsl(152,80%,80%)", "hsl(228,30%,40%)"])
.interpolate(d3.interpolateHcl);
// Compute the layout.
const pack = data => d3.pack()
.size([width, height])
.padding(3)
(d3.hierarchy(data)
.sum(d => d.value)
.sort((a, b) => b.value - a.value));
const root = pack(data);
// Create the SVG container.
const svg = d3.create("svg")
.attr("viewBox", `-${width / 2} -${height / 2} ${width} ${height}`)
.attr("width", width)
.attr("height", height)
.attr("style", `max-width: 100%; height: auto; display: block; margin: 0 -14px; background: ${color(0)}; cursor: pointer;`);
// Append the nodes.
const node = svg.append("g")
.selectAll("circle")
.data(root.descendants().slice(1))
.join("circle")
.attr("fill", d => d.children ? color(d.depth) : "white")
.attr("pointer-events", d => !d.children ? "none" : null)
.on("mouseover", function() { d3.select(this).attr("stroke", "#000"); })
.on("mouseout", function() { d3.select(this).attr("stroke", null); })
.on("click", (event, d) => focus !== d && (zoom(event, d), event.stopPropagation()));
// Append the text labels.
const label = svg.append("g")
.style("font", "10px sans-serif")
.attr("pointer-events", "none")
.attr("text-anchor", "middle")
.selectAll("text")
.data(root.descendants())
.join("text")
.style("fill-opacity", d => d.parent === root ? 1 : 0)
.style("display", d => d.parent === root ? "inline" : "none")
.text(d => d.data.name);
// Create the zoom behavior and zoom immediately in to the initial focus node.
svg.on("click", (event) => zoom(event, root));
let focus = root;
let view;
zoomTo([focus.x, focus.y, focus.r * 2]);
function zoomTo(v) {
const k = width / v[2];
view = v;
label.attr("transform", d => `translate(${(d.x - v[0]) * k},${(d.y - v[1]) * k})`);
node.attr("transform", d => `translate(${(d.x - v[0]) * k},${(d.y - v[1]) * k})`);
node.attr("r", d => d.r * k);
}
function zoom(event, d) {
const focus0 = focus;
focus = d;
const transition = svg.transition()
.duration(event.altKey ? 7500 : 750)
.tween("zoom", d => {
const i = d3.interpolateZoom(view, [focus.x, focus.y, focus.r * 2]);
return t => zoomTo(i(t));
});
label
.filter(function(d) { return d.parent === focus || this.style.display === "inline"; })
.transition(transition)
.style("fill-opacity", d => d.parent === focus ? 1 : 0)
.on("start", function(d) { if (d.parent === focus) this.style.display = "inline"; })
.on("end", function(d) { if (d.parent !== focus) this.style.display = "none"; });
}
return svg.node();
}
data = FileAttachment("flare-2.json").json()
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.
