tSNE in 1D is supposed to give interesting results — trying to reproduce http://gis.stackexchange.com/questions/15528/one-dimensional-map-of-the-world/15567#15567
forked from Fil's block: t-SNE with Levenshtein distances
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<head>
<meta charset="utf-8">
<script src="https://d3js.org/d3.v4.min.js"></script>
<style>
body {
margin: 0;
position: fixed;
top: 0;
right: 0;
bottom: 0;
left: 0;
font-family: monospace;
}
path.link {
stroke: rgba(0,0,0,0.3);
fill: none;
}
</style>
</head>
<body>
<script>
const width = 960,
height = 500,
margin = { top: 40, bottom: 40, left: 140, right: 140 },
scalepop = d3.scaleSqrt().domain([0, 100000]).range([3, 3]),
scalecountry = d3.scaleOrdinal(d3.schemeCategory20b),
centerx = d3.scaleLinear()
.range([margin.left, width - margin.right]),
centery = d3.scaleLinear()
.range([margin.top, height - margin.bottom]);
const projection = d3.geoAlbersUsa(),
path = d3.geoPath(projection);
d3.csv('cities.csv', function (cities) {
// US= 840
// France = 250
const data = cities
.filter(d => +d['Country Code'] == 840)
.sort((a, b) => d3.descending(+a[2015], +b[2015]))
.map((d, i) => {
return {
lon: +d.Longitude,
lat: +d.Latitude,
name: d['Urban Agglomeration'],
r: scalepop(+d[2015]),
color: scalecountry(+d['Country Code'])
};
})
.slice(0,50);
/*
const canvas = d3.select("body").append("canvas")
.attr("width", width)
.attr("height", height);
*/
const svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height);
// pos is the array of positions that will be updated by the tsne worker
// start with the geographic coordinates as is (plate-carrée)
// random or [0,0] is fine too
let pos = data.map(d => [d.lon, d.lat]);
drawsvg(svg, data);
if(false)
forcetsne = d3.forceSimulation(
data.map(d => (d.x = width / 2, d.y = height / 2, d))
)
.alphaDecay(0.005)
.alpha(0.1)
.force('tsne', function (alpha) {
centerx.domain(d3.extent(pos.map(d => d[0])));
centery.domain(d3.extent(pos.map(d => d[1])));
data.forEach((d, i) => {
d.x += alpha * (centerx(pos[i][0]) - d.x);
d.y += alpha * (200 - d.y);
});
})
.force('collide', d3.forceCollide().radius(d => 1.5 + d.r))
.on('tick', function () {
// drawcanvas(canvas, data);
//
drawlinks(svg, pos);
});
function drawcanvas(canvas, nodes) {
let context = canvas.node().getContext("2d");
context.clearRect(0, 0, width, width);
for (var i = 0, n = nodes.length; i < n; ++i) {
var node = nodes[i];
context.beginPath();
context.moveTo(node.x, node.y);
context.arc(node.x, node.y, node.r, 0, 2 * Math.PI);
context.lineWidth = 0.5;
context.fillStyle = node.color;
context.fill();
}
}
function drawsvg(svg, nodes) {
const g = svg.selectAll('g.city')
.data(nodes);
var enter = g.enter().append('g').classed('city', true);
enter.append('circle')
.attr('r', d => d.r)
.attr('fill', d => d.color)
.append('title')
.text(d => d.name);
enter
.filter(d => d.r > 7)
.append('text')
.attr('fill', 'white')
.style('font-size', d => d.r > 9 ? '12px' : '9px')
.attr('text-anchor', 'middle')
.attr('dominant-baseline', 'middle')
.attr('pointer-events', 'none')
.text(d => d.name.substring(0,2));
svg.selectAll('g.city').attr('transform', d => `translate(${projection([d.lon, d.lat])})`);
}
function drawlinks(svg, pos){
let p = pos
.map((d,i) => {
d.index = i;
let k = data[i];
d.coords = [k.lon, k.lat];
d.name = k.name;
return d;
})
.sort((a,b) => d3.ascending(a[0], b[0]));
p = p
.map((d,i) => {
d.next = p[(i+1) % pos.length].index;
d.nextname = p[(i+1) % pos.length].name;
return d;
});
//console.log(p.map(d=>d.name + ':' + d.nextname));
svg.selectAll('.link')
.data(p.slice(0,-1))
.enter()
.append('path')
.attr('class', 'link')
svg.selectAll('.link')
.attr('d', (d,i) => path({
type: 'LineString',
coordinates: [d.coords, p[(i+1) % pos.length].coords]
}));
}
d3.queue()
.defer(d3.text, 'tsne.js')
.defer(d3.text, 'https://unpkg.com/d3-geo')
.defer(d3.text, 'worker.js')
.awaitAll(function (err, scripts) {
const worker = new Worker(
window.URL.createObjectURL(
new Blob(scripts, {
type: "text/javascript"
})
)
);
worker.postMessage({
maxIter: 1400,
dim: 1,
perplexity: 10.0,
data: data
});
worker.onmessage = function (e) {
if (e.data.log) console.log.apply(this, e.data.log);
if (e.data.pos) pos = e.data.pos;
if (e.data.done && e.data.done < 10000 && e.data.cost > 1e-2) {
worker.postMessage({
maxIter: e.data.done + 10,
});
}
drawlinks(svg, pos);
};
});
});
</script>
</body>
https://d3js.org/d3.v4.min.js