Vote Cone — UninterpolatedVote Cone TransitionsReflecting on “Vote Cones”Election 2020: How reliable are different results at different stages?Election 2020 Vote–Time Correlation CartogramElection 2020 Vote Count Speed CartogramElection Cone — Iowa Senate 2016Election Cones — President 2016Election Cones — Senate 2016What’s the connection between these two election bar charts?Election 2020 DataElection 2020 Vote Margin CartogramElection 2020 Cone with Colored ContoursElection 2020 Cone with Labeled ContoursCalculate the percentage of remaining vote needed to overcome given absolute margin
Vote Cones in Vega-Lite
chart = vl
.data(data)
.encode(
vl
.x()
.fieldQ("x")
.axis({ title: "Votes counted", format: "%" }),
vl
.y()
.fieldQ("y")
.axis({
title: `Share of votes for ${republican.last_name} in ${state_id}`,
format: "%"
})
)
.layer(
vl
.markArea({ clip: true })
.data(endzoneR)
.encode(
vl.x().fieldQ("x"),
vl
.y()
.fieldQ("y")
.scale({ domain }),
vl.y2().fieldQ("y2"),
vl.opacity().value(.5),
vl.color().value("#dd2c35")
),
vl
.markArea({ clip: true })
.data(endzoneD)
.encode(
vl.x().fieldQ("x"),
vl
.y()
.fieldQ("y")
.scale({ domain }),
vl.y2().fieldQ("y2"),
vl.opacity().value(.5),
vl.color().value("#0080c9")
),
vl.markLine().encode(vl.color().value("black"))
)
.render()
race = president.data.races.find(d => d.state_id === state_id)
republican = race.candidates.find(d => d.party_id === "republican")
democrat = race.candidates.find(d => d.party_id === "democrat")
data = race.timeseries
.slice(1) // nyt data has spurious first point
.map(d => ({
y:
d.vote_shares[republican.candidate_key] /
(d.vote_shares[republican.candidate_key] +
d.vote_shares[democrat.candidate_key]),
x: d.eevp / 100
}))
domain = [0, 1]
contour = z => y => (y === 0 ? null : (0.5 + (y - 1) * z) / y)
endzoneR = range(domain, 20).map(x => ({ x, y: contour(0)(x), y2: 1 }))
endzoneD = range(domain, 20).map(x => ({ x, y: contour(1)(x), y2: 0 }))
range = ([x0, x1], n = 20) => [
...Array.from({ length: n }, (_, i) => x0 + ((x1 - x0) * i) / n),
x1
]
import {president} from "@tophtucker/election-2020-data"
import {select} from "@jashkenas/inputs"
import { vl } from "@vega/vega-lite-api"
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