Principal Web Developer at Freedom of the Press Foundation
Published
Edited
May 4, 2021
Importers
data = d3.csv('https://pressfreedomtracker.us/all-incidents/export/?fields=title,slug,date,categories', ({date, ...d}) => ({
date: d3.timeParse('%Y-%m-%d')(date),
...d
}))
dates = d3.timeDay.range(START_DATE, END_DATE).map((date, i) => ({
daysFromStart: i,
date,
incidents: data.filter(d => +d3.timeDay.floor(d.date) === +d3.timeDay.floor(date))
}))
annotations = [
[new Date(2017, 0, 20), 'Inauguration day.'],
[new Date(2017, 8, 15), 'A cop is found not guilty of murdering a black man, Anthony Lamar, whom he shot and killed, sparking a month of protests in St. Louis MO.'],
[new Date(2020, 2, 17), 'Stay-at-home restrictions begin in a few states.'],
[new Date(2020, 4, 25), 'Minneapolis police kill George Floyd, a black man in their custody, sparking a series of nationwide protests.'],
[new Date(2020, 10, 4), 'Election day.'],
[new Date(2021, 0, 6), 'Rioters storm the U.S. Capitol.'],
]
START_DATE = new Date(Date.UTC(2017, 0, 20))
END_DATE = new Date(Date.UTC(2021, 0, 21))
CHART_WIDTH = 500
CHART_HEIGHT = Math.ceil(dates.length / COLUMNS) * xScale.bandwidth() - 2
COLUMNS = 28
GUTTER = 2
xScale = d3.scaleBand().domain(d3.range(0, COLUMNS)).range([0, CHART_WIDTH + GUTTER])
yScale = v => Math.floor(v / xScale.domain().length) * xScale.bandwidth()
colorScale = d3.scaleLinear().domain([0, 10, 20]).range(['#EEE', '#38A', '#000'])
daysSinceStart = date => d3.timeDay.count(START_DATE, date) - 1
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