Radial lines

Examples · A radial line generator is like the Cartesian line generator except the x and y accessors are replaced with angle and radius accessors. Radial lines are positioned relative to the origin; use a transform to change the origin.

lineRadial()

Source · Constructs a new radial line generator with the default settings.

const line = d3.lineRadial();

lineRadial(data)

Source · Equivalent to line.

svg.append("path").attr("d", line(data)).attr("stroke", "currentColor");

lineRadial.angle(angle)

Source · Equivalent to line.x, except the accessor returns the angle in radians, with 0 at -y (12 o’clock).

const line = d3.lineRadial().angle((d) => a(d.Date));

lineRadial.radius(radius)

Source · Equivalent to line.y, except the accessor returns the radius: the distance from the origin.

const line = d3.lineRadial().radius((d) => r(d.temperature));

lineRadial.defined(defined)

Source · Equivalent to line.defined.

const line = d3.lineRadial().defined((d) => !isNaN(d.temperature));

lineRadial.curve(curve)

Source · Equivalent to line.curve. Note that curveMonotoneX or curveMonotoneY are not recommended for radial lines because they assume that the data is monotonic in x or y, which is typically untrue of radial lines.

const line = d3.lineRadial().curve(d3.curveBasis);

lineRadial.context(context)

Source · Equivalent to line.context.

const context = canvas.getContext("2d");
const line = d3.lineRadial().context(context);