Data Visualization Developer at The Associated Press
chart = {
const svg = d3.create("svg")
.attr("viewBox", [0, 0, width, height]);
const tooltip = new Tooltip()
svg.append("g")
.call(xAxis);
svg.append("g")
.call(yAxis);
const color = d3.scaleSequential().domain(d3.extent(data, d => d.culmen_depth_mm)).interpolator(d3.interpolatePuRd);
svg.append("g")
.selectAll("circle")
.data(data)
.join("circle")
.filter(d => d.body_mass_g)
.attr("cx", d => x(d.flipper_length_mm))
.attr("cy", d => y(d.body_mass_g))
.attr("r", 2)
svg.append("g")
.selectAll('path')
.data(data)
.join('path')
.attr("fill", d => color(d.culmen_depth_mm))
.attr("stroke", "#FFF")
.attr('opacity', .3)
.attr("d", (d, i) => voronoi.renderCell(i))
.on("mouseover", (event, d) => tooltip.show(d) )
svg.append(() => tooltip.node)
return svg.node();
}
data = FileAttachment("penguins.csv").csv({typed: true})
coords = data.map(d => [x(d.flipper_length_mm), y(d.body_mass_g)])
delaunay = d3.Delaunay.from(coords)
voronoi = delaunay.voronoi([margin.left, 0, width - margin.right, height - margin.top])
delaunay.render()
height = 600
x = d3.scaleLinear()
.domain(d3.extent(data, d => d.flipper_length_mm)).nice()
.range([margin.left, width - margin.right])
y = d3.scaleLinear()
.domain(d3.extent(data, d => d.body_mass_g)).nice()
.range([height - margin.bottom, margin.top])
xAxis = g => g
.attr("transform", `translate(0,${height - margin.bottom})`)
.call(d3.axisBottom(x))
yAxis = g => g
.attr("transform", `translate(${margin.left},0)`)
.call(d3.axisLeft(y))
margin = ({top: 25, right: 20, bottom: 35, left: 40})
d3 = require("d3@6")
class Tooltip {
constructor() {
this._name = htl.svg`<text font-size = '14px' font-weight = 'bold' stroke = '#FFF' stroke-width = '1px' paint-order = 'stroke fill'></text>`;
this.node = htl.svg`<g pointer-events="none" display="none" font-family="sans-serif" font-size="10" text-anchor="middle">
${this._name}
</g>`;
}
show(d) {
this.node.removeAttribute("display");
this.node.setAttribute("transform", `translate(${x(d.flipper_length_mm)},${y(d.body_mass_g)})`);
this._name.textContent = d.flipper_length_mm
}
hide() {
this.node.setAttribute("display", "none");
}
}
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