Bi-directional Split y-Axis Line Chart / Tiffany France

Published

Edited

Dec 13, 2020

Bi-directional Split y-Axis Line Chart

chart = {

const svg = d3.create("svg")

.attr("viewBox", [0, 0, width, height]);

svg.append("g")

.call(xAxis)

.attr("transform", `translate(0,${((height - margin.bottom) / 2)})`);

svg.append("g")

.call(yAxis);

svg.append("path")

.datum(data)

.attr("fill", "none")

.attr("stroke", "steelblue")

.attr("stroke-width", 2)

.attr("stroke-linejoin", "round")

.attr("stroke-linecap", "round")

.attr("d", line);

return svg.node();

}

y = d3.scaleLinear()

.domain(([-d3.max(data, d => d.value),d3.max(data, d => d.value)])).nice()

.range([height - margin.bottom, margin.top])

line = d3.line()

.curve(d3.curveCardinal)

.x(d => x(new Date(d.date)))

.y(d => y(d.value))

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