Published
Edited
Jun 11, 2020
import {
geo_data,
user_data,
similar_tracks
} from '@info474/last-fm-data-source-group-12'
geo_data
md`Which artists appears on the most top 50 list (by country)?`
artists = {
let artists = new Set();
geo_data.map(geo => {
geo.artists.map(artist => {
artists.add({ artist: artist.artist_name, geo: geo.country });
// let curr_artist = artists.find(d, => d.name == artist.artist_name);
// if(curr_artist) {
// curr_artist.countries = curr_artist.countries.push(geo.country)
// }
});
});
let count =
[...artists].ma
return artists;
}
[...artists]
d3 = require("d3")
by_artist = d3
.nest()
.key(d => d.artist)
.entries([...artists])
.sort((a, b) => b.values.length - a.values.length)
.filter((d, i) => i < 50)
chart = {
const svg = d3
.create("svg")
.attr("height", 500)
.attr("width", width);
svg
.selectAll(".artist")
.data(by_artist, d => d.key)
.join("rect")
.on("mouseenter", function(d) {
let text = "";
d.values.forEach(dd => (text = text + " " + dd.geo));
const pos = d3.mouse(this);
tip.attr("transform", `translate(${pos[0]}, ${pos[1] - 10})`);
tipText.text(d.key + " " + d.values.length + ' countries');
const { x, y, width: w, height: h } = tipText.node().getBBox();
tipRect
.attr("width", w)
.attr("height", h)
.attr("x", x)
.attr("y", y)
.attr("fill", "rgb(0, 255, 245)");
})
.on("mousemove", function(d) {
const pos = d3.mouse(this);
tip.attr("transform", `translate(${pos[0]}, ${pos[1] - 10})`);
})
.on("mouseout", function(d) {
// tip.text("");
})
.call(drawRect);
// Add a tooltip
const tip = svg.append("g").style("pointer-events", "none");
const tipRect = tip.append("rect");
const tipText = tip.append("text").style("text-anchor", "middle");
return svg.node();
}
drawRect = ele => {
ele
.attr("x", xScale(0))
.attr("width", d => xScale(d.values.length))
.style("opacity", 1)
.attr("height", yScale.bandwidth())
.attr("y", d => yScale(d.key));
}
xScale = d3
.scaleLinear()
.domain([0, d3.max(by_artist, d => d.values.length)])
.range([200, width])
xScale(d3.max(by_artist, d => d.values.length))
yScale = d3
.scaleBand()
.domain(by_artist.map(d => d.key))
.range([0, 500])
.paddingInner(.1)
yScale("Coldplay")
by_artist.map(d => d.key)
html`<style>
// rect:hover {
// fill:red;
// }
</style>`
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