Data visualization software enginner: working to make visualization more accessible, equitable, and impactful.
Unlisted
Edited
Feb 27
{
const chart = Plot.plot({
marks: [
Plot.barY(byState, {
x: "state",
y: "population",
sort: { x: "y", reverse: true },
opacity: 0.1
}),
Plot.dot(
byState,
Plot.pointerX({
x: "state",
y: "population",
fill: "black",
r: 5,
sort: { x: "y", reverse: true },
render(index, scales, values, dimensions, context, next) {
const g = next(index, scales, values, dimensions, context);
g.addEventListener("pointermove", (event) => {
event.stopImmediatePropagation(); // prevent click-to-stick
const i = event.target.__data__;
console.log({ i, index });
d3.select(context.ownerSVGElement)
.append("circle")
.attr("r", 10)
.attr("stroke", "red")
.attr("fill", "none")
.attr("cx", values.x[i] + scales.scales.x.bandwidth / 2)
.attr("cy", values.y[i]);
});
return g;
}
})
)
],
width
});
return chart;
}
{
const chart = Plot.plot({
marks: [
Plot.barY(byState, {
x: "state",
y: "population",
sort: { x: "y", reverse: true },
opacity: 0.1,
tip: {
anchor: "left"
}
}),
Plot.dot(
byState,
Plot.pointer({
x: "state",
y: "population",
fill: "black",
r: 5,
sort: { x: "y", reverse: true },
render(index, scales, values, dimensions, context, next) {
if (!next) return null;
const g = next(index, scales, values, dimensions, context);
if (!g) return null;
let clicked = false;
g.addEventListener("mouseenter", (event) => {
if (clicked) return;
console.log("mouseneter", index);
event.stopImmediatePropagation(); // prevent click-to-stick
d3.select(context.ownerSVGElement)
.append("circle")
.attr("r", 10)
.attr("stroke", "red")
.attr("fill", "none")
.attr("cx", values.x[index[0]] + scales.scales.x.bandwidth / 2)
.attr("cy", values.y[index[0]]);
clicked = true;
});
return g;
}
})
)
],
width
});
return chart;
}
{
const chart = Plot.plot({
marks: [
Plot.barY(byState, {
x: "state",
y: "population",
sort: { x: "y", reverse: true },
tip: true,
render(index, scales, values, dimensions, context, next) {
const g = next(index, scales, values, dimensions, context);
g.addEventListener("pointerdown", (event) => {
event.stopPropagation();
const i = event.target.__data__;
d3.select(context.ownerSVGElement)
.append("circle")
.attr("r", 5)
.attr("fill", "red")
.attr("cx", values.x[i] + scales.scales.x.bandwidth / 2)
.attr("cy", values.y2[i]);
});
return g;
}
})
],
width
});
// chart.addEventListener("pointerdown", (event) => {
// event.stopPropagation();
// const tip = chart.querySelector("[aria-label='tip']");
// console.log({ tip, data: tip.__data__ });
// });
return chart;
}
import { tidy } from "@observablehq/plot-stacked-bar-chart"
byState = Array.from(
d3.rollup(
tidy,
(values) => d3.sum(values, (d) => d.population), // Sum population per state
(d) => d.state // Group by state
),
([state, population]) => ({ state, population }) // Convert Map to array of objects
)
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