Streamgraph transitionsLine chart, multiple seriesBand chartDifference chartDiverging stacked bar chartNormalized stacked area chartRadial area chartHorizon chartStreamgraphPie chartArea chartStacked area chartStacked bar chart, normalizedStacked bar chart, horizontalStacked bar chartArc CornersPie settingsSpline EditorScatterplot with shapesContext to CurveDraw MeTidy Stacked Area ChartCurvesFitted Symbolsd3.lined3.lineRadialCanvas Horizon ChartPie chart component
Arc Pad Angle
chart = {
const data = [1, 1, 2, 3, 5, 8, 13, 21];
const pie1 = d3.pie().padAngle(0.03); // fixed pad angle (bad)
const pie2 = d3.pie().padAngle(padAngle); // adjusted pad angle (good)
const arc = d3.arc().innerRadius(innerRadius).outerRadius(outerRadius);
const svg = d3.create("svg")
.attr("viewBox", [0, -height / 2, width, height]);
const g = svg.selectAll("g")
.data(() => [pie1(data), pie2(data)])
.join("g")
.attr("fill", (d, i) => ["brown", "steelblue"][i])
.attr("transform", (d, i) => `translate(${width / 2 * (i + 0.5)})`);
g.append("g")
.attr("fill", "none")
.attr("stroke", "#777")
.selectAll("path")
.data(arcs => arcs)
.join("path")
.attr("d", arc.padAngle(0));
g.append("g")
.attr("stroke", "#000")
.attr("stroke-width", "1.5px")
.attr("stroke-linejoin", "round")
.selectAll("path")
.data(arcs => arcs)
.join("path")
.attr("d", arc.padAngle(padAngle));
return svg.node();
}
width = 960
height = 500
outerRadius = height / 2 - 30
innerRadius = outerRadius / 3
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.
