Data Analyst
Published
Edited
Jul 17, 2019
2 stars
chart = {
const svg = d3.select(DOM.svg(width, height));
const circles = svg.append("g")
.attr("fill", "steelblue")
.selectAll("circle")
.data(obj_arr_data)
.join("circle")
.attr("cx", d => x(d.x))
//.attr("width", d => Math.max(0, x(d.x1) - x(d.x0) - 1))
.attr("r", 4)
.attr("cy", 0)
circles.transition()
.delay(d => d.y * 10)
.duration(500)
.attr("cy", d => y(d.y))
//.attr("height", d => y(0) - y(d.length));
svg.append("g")
.call(xAxis);
svg.append("g")
.call(yAxis);
return svg.node();
}
data = Object.assign(await d3.csv("https://gist.githubusercontent.com/mbostock/682b782da9e1448e6eaac00bb3d3cd9d/raw/0e0a145ded8b1672701dc8b2a702e51c648312d4/unemployment.csv", ({rate}) => +rate), {x: "Unemployment (%)", y: "Counties"})
bins = d3.histogram()
.domain(x.domain())
.thresholds(x.ticks(40))
(data).map(d => d.sort())
x = d3.scaleLinear()
.domain(d3.extent(data)).nice()
.range([margin.left, width - margin.right])
y = d3.scaleLinear()
.domain([0, d3.max(bins, d => d.length)]).nice()
.range([height - margin.bottom, margin.top])
xAxis = g => g
.attr("transform", `translate(0,${height - margin.bottom})`)
.call(d3.axisBottom(x).tickSizeOuter(0))
.call(g => g.append("text")
.attr("x", width - margin.right)
.attr("y", -4)
.attr("fill", "#000")
.attr("font-weight", "bold")
.attr("text-anchor", "end")
.text(data.x))
yAxis = g => g
.attr("transform", `translate(${margin.left},0)`)
.call(d3.axisLeft(y))
.call(g => g.select(".domain").remove())
.call(g => g.select(".tick:last-of-type text").clone()
.attr("x", 4)
.attr("text-anchor", "start")
.attr("font-weight", "bold")
.text(data.y))
height = 500
margin = ({top: 20, right: 20, bottom: 30, left: 40})
d3 = require("d3@5")
function getIndsArrays(arr) {
return Array.from({length: arr.length}, (x, i) => i)
}
y_scale_inds = bins.map(d => getIndsArrays(d)).flat()
x_scale_inds = bins.map(d => getX(d)).flat()
obj_arr_data = {
let obj_arr = []
for (let i = 0; i < x_scale_inds.length; i++) {
let obj = {}
obj.x = x_scale_inds[i]
obj.y = y_scale_inds[i]
obj_arr.push(obj)
}
return obj_arr
}
function getX(arr) {
let al = arr.length
return Array(al).fill((arr.x0 + arr.x1) /2)
}
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