This word cloud shows polarized words from reviews of accommodations in London. Bigger words were identified more often by sentiment analyzers. Color represents polarity (green is positive, red is negative). Use the mouse to pan and zoom.
Data is obtained from the Tour-Pedia APIs, that in turn get their input from the sentiment analysis pipeline of the OpeNER project.
The implementation makes use of d3.layout.cloud by Jason Davies.
// DATA
var words = 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Math.seedrandom('abcde'); // define a fixed random seed, to avoid to have a different layout on each page reload. change the string to randomize
var words_frequency = [];
Object.keys(words).forEach(function(word_lemma){
o = words[word_lemma];
o.lemma = word_lemma;
words_frequency.push(o);
});
var max = d3.max(Object.keys(words), function(k){
return words[k].count;
});
console.log(max);
var font_size = d3.scale.linear()
.domain([1, max])
.range([10,100]);
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.range([d3.hcl(36, 65, 50), d3.hcl(95, 65, 80), d3.hcl(150, 65, 50)])
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var color = d3.scale.quantize()
.domain([-max, max])
.range([d3.hcl(36, 65, 50), d3.hcl(150, 65, 50)]);
words_frequency.sort(function(a,b){
return b.count - a.count;
});
d3.layout.cloud().size([960, 500])
.words(words_frequency)
.rotate(function() { return ~~(Math.random() * 2) * 90; })
.font("Impact")
.spiral('rectangular')
.text(function(d){ return d.lemma; })
.fontSize(function(d){ return font_size(d.count); })
.on("end", draw)
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function draw(words) {
var svg = d3.select("body").append("svg")
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// append a group for zoomable content
var zoom_group = svg.append('g');
// define a zoom behavior
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.scaleExtent([1,4]) // min-max zoom
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// modify translation and scale of the zoom group accordingly
zoom_group.attr('transform', 'translate('+zoom.translate()+')scale('+zoom.scale()+')');
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// bind the zoom behavior to the main SVG
svg.call(zoom);
zoom_group.append("g")
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.selectAll("text")
.data(words)
.enter().append("text")
.style("font-size", function(d){ return font_size(d.count) + "px"; })
.style("font-family", "Impact")
.style("fill", function(d) { return color(d.polarity); })
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var far = 1500*(Math.random() > 0.5 ? +1 : -1);
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.text(function(d) { return d.lemma; })
.transition().duration(2000)
.attr("transform", function(d) {
return "translate(" + [d.x, d.y] + ")rotate(" + d.rotate + ")";
});
}<!DOCTYPE html>
<html>
<head>
<meta name="description" content="OpeNER - Polarized words (London)" />
<meta charset="utf-8">
<title>OpeNER - Polarized words (London)</title>
<script src="//d3js.org/d3.v3.min.js" charset="utf-8"></script>
<script src='layout.cloud.js'></script>
<script src="//d3js.org/queue.v1.min.js"></script>
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cloud.size = function(x) {
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cloud.font = function(x) {
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cloud.rotate = function(x) {
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rotate = d3.functor(x);
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cloud.spiral = function(x) {
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hsr = h * sr;
w = (Math.max(Math.abs(wcr + hsr), Math.abs(wcr - hsr)) + 0x1f) >> 5 << 5;
h = ~~Math.max(Math.abs(wsr + hcr), Math.abs(wsr - hcr));
} else {
w = (w + 0x1f) >> 5 << 5;
}
if (h > maxh) maxh = h;
if (x + w >= (cw << 5)) {
x = 0;
y += maxh;
maxh = 0;
}
if (y + h >= ch) break;
c.translate((x + (w >> 1)) / ratio, (y + (h >> 1)) / ratio);
if (d.rotate) c.rotate(d.rotate * cloudRadians);
c.fillText(d.text, 0, 0);
if (d.padding) c.lineWidth = 2 * d.padding, c.strokeText(d.text, 0, 0);
c.restore();
d.width = w;
d.height = h;
d.xoff = x;
d.yoff = y;
d.x1 = w >> 1;
d.y1 = h >> 1;
d.x0 = -d.x1;
d.y0 = -d.y1;
d.hasText = true;
x += w;
}
var pixels = c.getImageData(0, 0, (cw << 5) / ratio, ch / ratio).data,
sprite = [];
while (--di >= 0) {
d = data[di];
if (!d.hasText) continue;
var w = d.width,
w32 = w >> 5,
h = d.y1 - d.y0;
// Zero the buffer
for (var i = 0; i < h * w32; i++) sprite[i] = 0;
x = d.xoff;
if (x == null) return;
y = d.yoff;
var seen = 0,
seenRow = -1;
for (var j = 0; j < h; j++) {
for (var i = 0; i < w; i++) {
var k = w32 * j + (i >> 5),
m = pixels[((y + j) * (cw << 5) + (x + i)) << 2] ? 1 << (31 - (i % 32)) : 0;
sprite[k] |= m;
seen |= m;
}
if (seen) seenRow = j;
else {
d.y0++;
h--;
j--;
y++;
}
}
d.y1 = d.y0 + seenRow;
d.sprite = sprite.slice(0, (d.y1 - d.y0) * w32);
}
}
// Use mask-based collision detection.
function cloudCollide(tag, board, sw) {
sw >>= 5;
var sprite = tag.sprite,
w = tag.width >> 5,
lx = tag.x - (w << 4),
sx = lx & 0x7f,
msx = 32 - sx,
h = tag.y1 - tag.y0,
x = (tag.y + tag.y0) * sw + (lx >> 5),
last;
for (var j = 0; j < h; j++) {
last = 0;
for (var i = 0; i <= w; i++) {
if (((last << msx) | (i < w ? (last = sprite[j * w + i]) >>> sx : 0))
& board[x + i]) return true;
}
x += sw;
}
return false;
}
function cloudBounds(bounds, d) {
var b0 = bounds[0],
b1 = bounds[1];
if (d.x + d.x0 < b0.x) b0.x = d.x + d.x0;
if (d.y + d.y0 < b0.y) b0.y = d.y + d.y0;
if (d.x + d.x1 > b1.x) b1.x = d.x + d.x1;
if (d.y + d.y1 > b1.y) b1.y = d.y + d.y1;
}
function collideRects(a, b) {
return a.x + a.x1 > b[0].x && a.x + a.x0 < b[1].x && a.y + a.y1 > b[0].y && a.y + a.y0 < b[1].y;
}
function archimedeanSpiral(size) {
var e = size[0] / size[1];
return function(t) {
return [e * (t *= .1) * Math.cos(t), t * Math.sin(t)];
};
}
function rectangularSpiral(size) {
var dy = 4,
dx = dy * size[0] / size[1],
x = 0,
y = 0;
return function(t) {
var sign = t < 0 ? -1 : 1;
// See triangular numbers: T_n = n * (n + 1) / 2.
switch ((Math.sqrt(1 + 4 * sign * t) - sign) & 3) {
case 0: x += dx; break;
case 1: y += dy; break;
case 2: x -= dx; break;
default: y -= dy; break;
}
return [x, y];
};
}
// TODO reuse arrays?
function zeroArray(n) {
var a = [],
i = -1;
while (++i < n) a[i] = 0;
return a;
}
var cloudRadians = Math.PI / 180,
cw = 1 << 11 >> 5,
ch = 1 << 11,
canvas,
ratio = 1;
if (typeof document !== "undefined") {
canvas = document.createElement("canvas");
canvas.width = 1;
canvas.height = 1;
ratio = Math.sqrt(canvas.getContext("2d").getImageData(0, 0, 1, 1).data.length >> 2);
canvas.width = (cw << 5) / ratio;
canvas.height = ch / ratio;
} else {
// Attempt to use node-canvas.
canvas = new Canvas(cw << 5, ch);
}
var c = canvas.getContext("2d"),
spirals = {
archimedean: archimedeanSpiral,
rectangular: rectangularSpiral
};
c.fillStyle = c.strokeStyle = "red";
c.textAlign = "center";
if (typeof module === "object" && module.exports) module.exports = cloud;
else (d3.layout || (d3.layout = {})).cloud = cloud;
})();