The avatar for @tonyhschu
Tony Chu
Published
Coronavirus
Edited
Mar 13, 2020
6 stars
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viewof currentCases = new View(2000)
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viewof daysToDoubling = new View(6.0)
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viewof percentageOfBedsOccupied = new View(65)
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viewof percentageOfSevereCases = new View(10)
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md`### Visualization Helpers

Much thanks to @mbostock, from https://observablehq.com/@d3/styled-axes`
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resetFunction = () => {
viewof currentCases.value = 2000;
viewof daysToDoubling.value = 6;
viewof percentageOfBedsOccupied.value = 65;
viewof percentageOfSevereCases.value = 10;
}
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casesTimeSeriesBisector = d3.bisector(d => d.cases).right
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areaGenerator = d3.area()
.x(function(d) { return dateScale(d.date); })
.y1(function(d) { return casesScale(d.cases); })
.y0(casesScale(0));
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xAxis = svg => svg
.attr("transform", `translate(0,${height - margin.bottom})`)
.call(d3.axisBottom(dateScale)
.ticks(d3.timeWeek.every(2))
.tickFormat(dateFormat))
.call(g => g.select(".domain")
.remove())
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yAxis = svg => svg
.attr("transform", `translate(${margin.left},0)`)
.call(d3.axisRight(casesScale)
.tickSize(width - margin.left - margin.right))
.call(g => g.select(".domain")
.remove())
.call(g => g.selectAll(".tick:not(:first-of-type) line")
.attr("stroke-opacity", 0.5)
.attr("stroke-dasharray", "2,2"))
.call(g => g.selectAll(".tick text")
.attr("x", 4)
.attr("dy", -4))
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height = 450
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margin = ({top: 20, right: 0, bottom: 30, left: 0})
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numberFormat = d3.format(",.4r")
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largeNumberFormat = d3.formatPrefix(",.1", 1e6)
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dateFormat = d3.timeFormat("%Y-%m-%d");
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dateFormatInProse = d3.timeFormat("%b %e");
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casesScale = d3.scaleLinear()
.domain(casesDomain)
.range([height - margin.bottom, margin.top])
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dateScale = d3.scaleTime()
.domain(dateDomain)
.range([margin.left, width - margin.right])
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d3 = require("d3@5")
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