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Density Plots
Edited
Jan 26, 2021
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density = {
let w = Math.min(675, width);
return pointDensity(w, Math.round(w / 1.5))
.xDomain([-3.5, 3.5])
.yDomain([-2.25, 2.25]);
}
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color = d3.scaleDivergingLog(
[0.1, 1, 10],
// cacheInterpolator speeds up colorization by returning cached {r, g, b} objects
cacheInterpolator(d3.interpolateRdBu)
)
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maxPoints = 1e6
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stdev = 0.5
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// Smooth the fraction a / b towards x with strength α
smooth = (a, b, x, α) => (a + x * α) / (b + α)
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rand = d3.randomNormal(0, stdev) // Sample coordinates from a normal distribution
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dataA = allDataA.slice(0, Math.round(numPoints / 2))
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dataB = allDataB.slice(0, Math.round(numPoints / 2))
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allDataA = generate(Math.ceil(maxPoints / 2), -1)
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allDataB = generate(Math.ceil(maxPoints / 2), 1)
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generate = (length, sign) =>
Array.from({ length }, () => [rand() - sign * .5 * stdev * offset, rand()])
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import {
densityPlot,
pointDensity,
cacheInterpolator
} from '@twitter/density-plot@4159'
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