The avatar for @john-h-knight
John Knight
Public
Data Science Workflows in JS Workshop
Edited
Jul 25, 2023
Fork of Data science workflows in JavaScript - Session 2 Key
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gentoo = d3.csv("https://portal.edirepository.org/nis/dataviewer?packageid=knb-lter-pal.220.7&entityid=e03b43c924f226486f2f0ab6709d2381", d3.autoType)
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adelie = d3.csv("https://portal.edirepository.org/nis/dataviewer?packageid=knb-lter-pal.219.5&entityid=002f3893385f710df69eeebe893144ff", d3.autoType)
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chinstrap = d3.csv("https://portal.edirepository.org/nis/dataviewer?packageid=knb-lter-pal.221.8&entityid=fe853aa8f7a59aa84cdd3197619ef462", d3.autoType)
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penguinsCombo = adelie.concat(gentoo, chinstrap)
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penguins = penguinsCombo.map((d) => ({
species: d.Species.split(" ")[0],
island: d.Island,
sex: d.Sex == null || d.Sex == "." ? null : d.Sex.toLowerCase(),
bill_length_mm: d["Culmen Length (mm)"],
bill_depth_mm: d["Culmen Depth (mm)"],
body_mass_g: d["Body Mass (g)"],
flipper_length_mm: d["Flipper Length (mm)"]}))
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import {aq, op} from "@uwdata/arquero"
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penguinsTable = aq.from(penguins)
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penguinsTable
.filter(d => d.sex === "female")
.select('species', 'bill_depth_mm', 'bill_length_mm')
.derive({bill_ratio: d => d.bill_length_mm / d.bill_depth_mm})
.groupby('species')
.rollup({ mean_bill_ratio: d => op.mean(d.bill_ratio)})
.view()
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penguins
X
bill_length_mm
Y
bill_depth_mm
Color
species
Size
—
Facet X
—
Facet Y
—
Mark
Auto
Type Chart, then Shift-Enter. Ctrl-space for more options.

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Plot.plot({
color: { legend: true },
marks: [
Plot.dot(penguins, {
x: "bill_length_mm",
y: "bill_depth_mm",
fill: "species",
tip: true,
r: "body_mass_g",
opacity: 0.5
}),
Plot.frame()
],
color: {range: ["teal", "darkorange", "orchid"]},
r: {domain: d3.extent(penguins.map(d => d.body_mass_g)), range: [1, 20]},
grid: true
})
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import {PlotMatrix} with {data} from "@observablehq/autoplot-matrix"
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data = penguins
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PlotMatrix(data)
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Plot.plot({
marks: [
Plot.rectY(
penguins,
Plot.binX(
{ y: "count" },
{ x: (d) => d[chooseVar], fill: "species", fy: "species"}
)
),
Plot.frame()
],
marginRight: 100
})
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penguins
X
body_mass_g
Y
—
Color
—
Size
—
Facet X
sex
Facet Y
species
Mark
Auto
Type Chart, then Shift-Enter. Ctrl-space for more options.

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viewof chooseWidth = Inputs.range([50, 500], {label: "Bin width:", step: 10})
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Plot.plot({
marks: [
Plot.frame({ strokeOpacity: 0.1 }),
Plot.rectY(
penguins,
Plot.binX(
{ y: "count" },
{ fx: "sex", fy: "species", x: "body_mass_g", tip: true, fill: "species", interval: chooseWidth }
)
),
Plot.ruleY([0])
],
marginRight: 100,
width: 800
})
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import {scale} from "@chrispahm/hierarchical-clustering"
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penguins
Type Table, then Shift-Enter. Ctrl-space for more options.

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penguinsComplete = penguins.filter((d) => d.bill_length_mm !== null)// && d.sex == "female")
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penguinsScale = scale(penguinsComplete)
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penguinsArray = penguinsScale.map(
(d) => [d.bill_length_mm, d.bill_depth_mm, d.body_mass_g, d.flipper_length_mm]
)
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penguinsClusters = ML.KMeans(penguinsArray, 3)
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penguinsKmeans = penguinsComplete.map((d,i) => ({...d, clusterNo: penguinsClusters.clusters[i]}))
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myChart = Plot.plot({ // Remember to name if you want to use embeds!
marks: [
Plot.text(penguinsKmeans, {
x: "body_mass_g",
y: "flipper_length_mm",
text: "clusterNo",
fontSize: "15px",
fontWeight: 500,
fill: "species",
tip: true
})
],
color: { legend: true }
})
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clusterCounts = d3.rollup(penguinsKmeans, v => v.length, d => d.species, d => d.clusterNo)
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ML = require("https://www.lactame.com/lib/ml/6.0.0/ml.min.js")
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penguinsKeyCopy = penguins
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