Plot.plot({
marks: [
Plot.frame(),
Plot.dot(worldbank, {
filter: d => d.year == 2010,
x: "gdp",
y: "co2",
fill:"#ccc",
r:"life_exp",
opacity:0.5,
}),
Plot.dot(worldbank, {
filter: d => d.year == 2010,
x: "gdp",
y: "co2",
fill:"life_exp",
r:"life_exp",
opacity:0.5,
fy:"income_group"
})
],
color: { legend: true, scheme:"BuPu", reverse:true},
r: { domain: d3.extent(worldbank, (d) => d.life_exp), range: [1, 10] },
x:{type:"log"},
y:{type:"log"},
fy:{domain:["NA, Low income", "Lower middle income","Upper middle income", "High income"], reverse:true}
})