pixel flipper, data sifter. trying to see what I can while I'm here
Public
Edited
Nov 7
8 stars
umap-001.parquet
Type Table, then Shift-Enter. Ctrl-space for more options.
multiple = 1
mapSize = width * multiple
pointSize = 1 * multiple
pointOpacity = 0.5
points = scope.filter(d => d.x > -.5 && d.y > -.5)
xExtent = d3.extent(points, d => d.x)
yExtent = d3.extent(points, d => d.y)
rgb = 100
canvas = {
const width = mapSize
const height = mapSize
const margin = 20
const ctx = DOM.context2d(width, height);
ctx.fillStyle = "#111";
ctx.fillRect(0, 0, width, height);
const x = d3.scaleLinear()
.domain(xExtent)
.range([margin, width - margin])
const y = d3.scaleLinear()
.domain(yExtent)
.range([height - margin, margin])
// const opacity = animation
const opacity = pointOpacity
ctx.fillStyle = `rgb(${rgb},${rgb},${rgb},${opacity})`
ctx.globalCompositeOperation = "screen" // overlay
let i, s, len;
const rw = pointSize
len = points.length;
for(i = 0; i < len; i++) {
s = points[i]
// ctx.fillRect(x(s.x), y(s.y), rw, rw)
ctx.beginPath()
ctx.arc(x(s.x), y(s.y), rw, 0, 2*Math.PI)
ctx.fill()
}
return ctx.canvas;
}
duration = 10000
animation = {
let start = Date.now();
while (true) {
let elapsed = Date.now() - start;
if (elapsed > duration) start = Date.now();
yield elapsed / duration;
}
}
d3.groups(scope, d => d.cluster).sort((a,b) => b[1].length - a[1].length)
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