Making sense of the world, one data story at a time.
Published
Edited
Mar 28, 2021
md`# India's Lower Judiciary 2013-2016
[Story](https://pratapvardhan.com/blog/india-lower-judiciary/) & [Twitter](https://twitter.com/PratapVardhan/status/1374960007695900679)
`
columns = ({
time: 'year',
id: 'state_2code',
x: 'cases_per_1L',
y: '%within_2years',
c: 'regions',
r: 'total_cases',
a1: 'regions',
a2: 'state_name',
xlabel: 'cases filed per 1L population →',
ylabel: '↑ % of cases decided within 2 years'
})
chart = {
const svg = d3.create("svg").attr("viewBox", [0, 0, width, height]);
svg.append("g").call(xAxis);
svg.append("g").call(yAxis);
svg.append("g").call(grid);
svg.append("g").call(credit);
const data_init = dataAt(config.start_year);
const line_init = linedataAt(config.start_year);
const path = svg
.append("g")
.attrs({
fill: "none",
"stroke-width": 2,
"stroke-linejoin": "round",
"stroke-linecap": "round"
})
.selectAll("path")
.data(line_init, d => d[0])
.join("path")
.style("mix-blend-mode", "multiply")
.attr("stroke", d => color(d[1][0][columns.c]))
.attr("stroke-opacity", d => (config.line_ids.includes(d[0]) ? 0.5 : 0))
.attr("d", d => line(d[1]));
const circle = svg
.append("g")
.attr("stroke", "#fff")
.attr("stroke-width", 0.5)
.selectAll("circle")
.data(data_init, d => d[columns.id])
.join("circle")
.sort((a, b) => d3.descending(a[columns.r], b[columns.r]))
.attr("cx", d => x(d[columns.x]))
.attr("cy", d => y(d[columns.y]))
.attr("r", d => radius(d[columns.r]))
.attr("fill", d => color(d[columns.c]))
.attr("fill-opacity", d =>
config.highlightcircles ? (isHighlight(d) ? 1 : 0.65) : 1
)
.call(circle =>
circle
.append("title")
.text(d => [d[columns.a1], d[columns.a2]].join("\n"))
);
const labels = svg
.append("g")
.selectAll("text")
.data(data_init, d => d[columns.id])
.join("text")
.sort((a, b) => d3.descending(a[columns.r], b[columns.r]))
.attr("x", d => x(d[columns.x]))
.attr("y", d => y(d[columns.y]))
.text(d => (isHighlight(d) ? d[columns.a2] : d[columns.id]))
.attr("text-anchor", "middle")
.attr("font-family", "sans-serif")
.attr("dy", "0.3em")
.attr("pointer-events", "none")
.attr("font-weight", d => (isHighlight(d) ? 'bold' : 'normal'))
.attr("font-size", d => config.label_size + (isHighlight(d) ? 2 : 0));
const year_text = svg
.append("g")
.attr(
"transform",
`translate(${width - margin.right}, ${height - margin.bottom})`
)
.attr("text-anchor", "end")
.append("text")
.attr("dy", -35)
.attr("dx", -10)
.attr("font-size", 88)
.attr("fill", "lightgray")
.attr("font-weight", 500)
.attr("font-family", "sans-serif");
return Object.assign(svg.node(), {
update(data, linedata) {
circle
.data(data, d => d[columns.id])
.sort((a, b) => d3.descending(a[columns.r], b[columns.r]))
.attr("cx", d => x(d[columns.x]))
.attr("cy", d => y(d[columns.y]))
.attr("r", d => radius(d[columns.r]));
labels
.data(data, d => d[columns.id])
.sort((a, b) => d3.descending(a[columns.r], b[columns.r]))
.attr("x", d => x(d[columns.x]))
.attr("y", d => y(d[columns.y]))
.text(d => (isHighlight(d) ? d[columns.a2] : d[columns.id]));
path.data(linedata, d => d[0]).attr("d", d => line(d[1]));
year_text.text(`${Math.floor(data[0].year)}`);
}
});
}
function isHighlight(d) {
return config.line_ids.includes(d[columns.id]);
}
linedataAt(config.start_year)
update = chart.update(currentData, currentLineData)
currentData = dataAt(year)
currentLineData = linedataAt(year)
line = d3
.line()
.curve(d3.curveCatmullRom)
.x(d => x(d[columns.x]))
.y(d => y(d[columns.y]))
function linedataAt(year) {
const y = Math.floor(year);
let tmp = data.filter(d => d[columns.time] <= y);
if (y != year) {
tmp = tmp.concat(dataAt(year));
}
return d3.groups(tmp, d => d[columns.id]);
}
function dataAt(year) {
return dataGroupedSorted.map(d => ({
[columns.id]: d[0],
[columns.a1]: d[1][0][columns.a1],
[columns.a2]: d[1][0][columns.a2],
[columns.x]: valueAt(year, d[1], obj => obj[columns.x]),
[columns.y]: valueAt(year, d[1], obj => obj[columns.y]),
[columns.r]: valueAt(year, d[1], obj => obj[columns.r]),
year: year
}));
}
bisectYear = d3.bisector(d => d[columns.time]).left
function valueAt(year, values, accessor) {
const i = bisectYear(values, year, 0, values.length - 1);
const a = accessor(values[i]);
if (i > 0) {
const b = accessor(values[i - 1]);
const w = values[i][columns.time] - year;
const v = a * (1 - w) + b * w;
return v;
}
return a;
}
radius = config.scale_radius(d3.extent(data, d => d[columns.r]), config.radius_range)
color = d3.scaleOrdinal().range(d3.schemeTableau10).domain(config.color_domain)
x = d3
.scaleLinear()
.range([margin.left, width - margin.right])
.domain(d3.extent(data, d => d[columns.x]))
y = d3
.scaleLinear()
.range([height - margin.bottom, margin.top])
.domain(d3.extent(data, d => d[columns.y]))
xAxis = g =>
g
.attr("transform", `translate(0,${height - margin.bottom})`)
.call(d3.axisBottom(x).ticks(width / 80))
.call(g => g.select(".domain").remove())
.call(g =>
g
.append("text")
.attr("x", width - margin.right)
.attr("y", margin.bottom - 14)
.attr("font-size", config.axis_label_size)
.attr("fill", "currentColor")
.attr("font-weight", "bold")
.attr("text-anchor", "end")
.text(columns.xlabel)
)
yAxis = g =>
g
.attr("transform", `translate(${margin.left},0)`)
.call(d3.axisLeft(y).tickFormat(d => d + '%'))
.call(g => g.select(".domain").remove())
.call(g =>
g
.append("text")
.attr("x", -margin.left)
.attr("y", 14)
.attr("font-size", config.axis_label_size)
.attr("fill", "currentColor")
.attr("font-weight", "bold")
.attr("text-anchor", "start")
.text(columns.ylabel)
)
credit = g =>
g
.attr("transform", `translate(${margin.left},${height - margin.bottom})`)
.append("text")
.attr("y", margin.bottom - 14)
.attr("text-anchor", "start")
.attr("font-size", config.axis_label_size)
.text(config.credit)
grid = g =>
g
.attr("stroke", "currentColor")
.attr("stroke-opacity", 0.1)
.call(g =>
g
.append("g")
.selectAll("line")
.data(x.ticks())
.join("line")
.attr("x1", d => 0.5 + x(d))
.attr("x2", d => 0.5 + x(d))
.attr("y1", margin.top)
.attr("y2", height - margin.bottom)
)
.call(g =>
g
.append("g")
.selectAll("line")
.data(y.ticks())
.join("line")
.attr("y1", d => 0.5 + y(d))
.attr("y2", d => 0.5 + y(d))
.attr("x1", margin.left)
.attr("x2", width - margin.right)
)
margin = ({ left: 50, right: 150, top: 25, bottom: 50 })
height = 500
dataGroupedSorted = {
const tmp = d3.groups(data, d => d[columns.id]);
tmp.forEach(d => {
d[1].sort((a, b) => a[columns.time] - b[columns.time]);
});
return tmp;
}
data = await FileAttachment("states-summary@2.json")
.json()
.then(arr => arr.filter(d => d.year >= 2013))
import { Scrubber } from "@mbostock/scrubber"
// d3 = require('d3', 'd3-selection-multi')
d3 = require.alias({
'd3-selection': 'd3',
d3: 'd3'
})('d3', 'd3-selection-multi')
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