我有两个字符，一个显示每年的发布数据，另一个是字云。词云显示标题。这是演示：
// Word cloud layout by Jason Davies, http://www.jasondavies.com/word-cloud/
// Algorithm due to Jonathan Feinberg, http://static.mrfeinberg.com/bv_ch03.pdf
(function() {
function cloud() {
var size = [256, 256],
text = cloudText,
font = cloudFont,
fontSize = cloudFontSize,
fontStyle = cloudFontNormal,
fontWeight = cloudFontNormal,
rotate = cloudRotate,
padding = cloudPadding,
spiral = archimedeanSpiral,
words = [],
timeInterval = Infinity,
event = d3.dispatch("word", "end"),
timer = null,
cloud = {};
cloud.start = function() {
var board = zeroArray((size[0] >> 5) * size[1]),
bounds = null,
n = words.length,
i = -1,
tags = [],
data = words.map(function(d, i) {
d.text = text.call(this, d, i);
d.font = font.call(this, d, i);
d.style = fontStyle.call(this, d, i);
d.weight = fontWeight.call(this, d, i);
d.rotate = rotate.call(this, d, i);
d.size = ~~fontSize.call(this, d, i);
d.padding = padding.call(this, d, i);
return d;
}).sort(function(a, b) { return b.size - a.size; });
if (timer) clearInterval(timer);
timer = setInterval(step, 0);
step();
return cloud;
function step() {
var start = +new Date,
d;
while (+new Date - start < timeInterval && ++i < n && timer) {
d = data[i];
d.x = (size[0] * (Math.random() + .5)) >> 1;
d.y = (size[1] * (Math.random() + .5)) >> 1;
cloudSprite(d, data, i);
if (d.hasText && place(board, d, bounds)) {
tags.push(d);
event.word(d);
if (bounds) cloudBounds(bounds, d);
else bounds = [{x: d.x + d.x0, y: d.y + d.y0}, {x: d.x + d.x1, y: d.y + d.y1}];
// Temporary hack
d.x -= size[0] >> 1;
d.y -= size[1] >> 1;
}
}
if (i >= n) {
cloud.stop();
event.end(tags, bounds);
}
}
}
cloud.stop = function() {
if (timer) {
clearInterval(timer);
timer = null;
}
return cloud;
};
cloud.timeInterval = function(x) {
if (!arguments.length) return timeInterval;
timeInterval = x == null ? Infinity : x;
return cloud;
};
function place(board, tag, bounds) {
var perimeter = [{x: 0, y: 0}, {x: size[0], y: size[1]}],
startX = tag.x,
startY = tag.y,
maxDelta = Math.sqrt(size[0] * size[0] + size[1] * size[1]),
s = spiral(size),
dt = Math.random() < .5 ? 1 : -1,
t = -dt,
dxdy,
dx,
dy;
while (dxdy = s(t += dt)) {
dx = ~~dxdy[0];
dy = ~~dxdy[1];
if (Math.min(dx, dy) > maxDelta) break;
tag.x = startX + dx;
tag.y = startY + dy;
if (tag.x + tag.x0 < 0 || tag.y + tag.y0 < 0 ||
tag.x + tag.x1 > size[0] || tag.y + tag.y1 > size[1]) continue;
// TODO only check for collisions within current bounds.
if (!bounds || !cloudCollide(tag, board, size[0])) {
if (!bounds || collideRects(tag, bounds)) {
var sprite = tag.sprite,
w = tag.width >> 5,
sw = size[0] >> 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++) {
board[x + i] |= (last << msx) | (i < w ? (last = sprite[j * w + i]) >>> sx : 0);
}
x += sw;
}
delete tag.sprite;
return true;
}
}
}
return false;
}
cloud.words = function(x) {
if (!arguments.length) return words;
words = x;
return cloud;
};
cloud.size = function(x) {
if (!arguments.length) return size;
size = [+x[0], +x[1]];
return cloud;
};
cloud.font = function(x) {
if (!arguments.length) return font;
font = d3.functor(x);
return cloud;
};
cloud.fontStyle = function(x) {
if (!arguments.length) return fontStyle;
fontStyle = d3.functor(x);
return cloud;
};
cloud.fontWeight = function(x) {
if (!arguments.length) return fontWeight;
fontWeight = d3.functor(x);
return cloud;
};
cloud.rotate = function(x) {
if (!arguments.length) return rotate;
rotate = d3.functor(x);
return cloud;
};
cloud.text = function(x) {
if (!arguments.length) return text;
text = d3.functor(x);
return cloud;
};
cloud.spiral = function(x) {
if (!arguments.length) return spiral;
spiral = spirals[x + ""] || x;
return cloud;
};
cloud.fontSize = function(x) {
if (!arguments.length) return fontSize;
fontSize = d3.functor(x);
return cloud;
};
cloud.padding = function(x) {
if (!arguments.length) return padding;
padding = d3.functor(x);
return cloud;
};
return d3.rebind(cloud, event, "on");
}
function cloudText(d) {
return d.text;
}
function cloudFont() {
return "serif";
}
function cloudFontNormal() {
return "normal";
}
function cloudFontSize(d) {
return Math.sqrt(d.value);
}
function cloudRotate() {
return (~~(Math.random() * 6) - 3) * 30;
}
function cloudPadding() {
return 1;
}
// Fetches a monochrome sprite bitmap for the specified text.
// Load in batches for speed.
function cloudSprite(d, data, di) {
if (d.sprite) return;
c.clearRect(0, 0, (cw << 5) / ratio, ch / ratio);
var x = 0,
y = 0,
maxh = 0,
n = data.length;
--di;
while (++di < n) {
d = data[di];
c.save();
c.font = d.style + " " + d.weight + " " + ~~((d.size + 1) / ratio) + "px " + d.font;
var w = c.measureText(d.text + "m").width * ratio,
h = d.size << 1;
if (d.rotate) {
var sr = Math.sin(d.rotate * cloudRadians),
cr = Math.cos(d.rotate * cloudRadians),
wcr = w * cr,
wsr = w * sr,
hcr = h * cr,
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;
})();<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>
<!DOCTYPE html>
<html>
<head>
<style type="text/css">
body{font-family: Arial, sans-serif;font-size:10px;}
.axis path,.axis line {fill: none;stroke:#b6b6b6;shape-rendering: crispEdges;}
.tick text{fill:#999;}
g.journal.active{cursor:pointer;}
text.label{font-size:12px;font-weight:bold;cursor:pointer;}
text.value{font-size:12px;font-weight:bold;}
</style>
</head>
<body>
<script type="text/javascript">
var datajson = [{"Researcher":"Karri",
"Published":[[2013,1]],"Total":1},
{"Researcher":"Ismo","Published":[[2013,1]],"Total":1},
{"Researcher":"Grigori","Published":[[2014,1],[2015,2]],"Total":3},
{"Researcher":"Ahmed","Published":[[2014,1],[2015,2]],"Total":3},
{"Researcher":"Roope","Published":[[2014,1],[2015,2]],"Total":3},
{"Researcher":"Arto","Published":[[2014,1],[2015,2]],"Total":3},
{"Researcher":"Daisuke","Published":[[2014,1],[2015,2]],"Total":3},
{"Researcher":"Arasawa","Published":[[2015,1]],"Total":1},
{"Researcher":"IkeHama","Published":[[2015,1]],"Total":1}];
var allDataJson = [{"Researchers":"Bulling Andreas, Majaranta Päivi","Year":"2011","Title":"Improved Interaction for Mid-Air Projection Screen Technology."},
{"Researchers":"Rakkolainen Ismo","Year":"2012","Title":"A biological stimulation device for training animals."},
{"Researchers":"Anttonen Jenni, Ovaska Saila","Year":"2013","Title":"Haptic covering for steering wheel (Haptic Device)."},
{"Researchers":"Rudnicky Alexander I., Turunen Markku, Kun Andrew, Paek Tim, Tashev Ivan","Year":"2014","Title":"Haptic Device."},
{"Researchers":"Valkama Pellervo, Hakulinen Jaakko, Raisamo Roope","Year":"2015","Title":"Tactile Imaging System."},
{"Researchers":"Santos de la Camara Raul, Turunen Markku, Benyon David","Year":"2011","Title":"PETMEI 2011: the 1st international workshop on pervasive eye tracking and mobile eye-based interaction."},
{"Researchers":"Worgan Simon, Turunen Markku","Year":"2012","Title":"Pseudo-Volumetric 3D Display Solutions."}];
var area1 = d3.select("body").append("div")
.attr("id","area1")
.style("width", 1500)
.style("float", "left");
var totalpubperyear = [{"Year":"2011","Total":42},{"Year":"2012","Total":49},{"Year":"2013","Total":60},{"Year":"2014","Total":64},{"Year":"2015","Total":5}];
var words = [{"Item":"workshop","Count":2},{"Item":"pervasive","Count":2},{"Item":"eye","Count":4},{"Item":"tracking","Count":2},{"Item":"mobile","Count":9},{"Item":"interaction","Count":9},{"Item":"Pseudo-Volumetric","Count":2},{"Item":"3D","Count":3},{"Item":"Display","Count":7},{"Item":"Solutions","Count":2},{"Item":"SiMPE:","Count":2}];
var bC = barChart(totalpubperyear);
var wC = wordCloud(words);
function prepareCloudJS(datajs){
var tF = datajs.map(function(d){return d.Title;});
var arr = [];
tF.map(function (e) {arr = arr.concat(e.split(/\s+/));});
for(var i = arr.length - 1; i >= 0; i--) {
if(arr[i] === "a") {arr.splice(i, 1);}
else if(arr[i] === "of") {arr.splice(i, 1);}
else if(arr[i] === "with") {arr.splice(i, 1);}
else if(arr[i] === "the") {arr.splice(i, 1);}
else if(arr[i] === "from") {arr.splice(i, 1);}
else if(arr[i] === "to") {arr.splice(i, 1);}
else if(arr[i] === "by") {arr.splice(i, 1);}
else if(arr[i] === "for") {arr.splice(i, 1);}
else if(arr[i] === "A") {arr.splice(i, 1);}
else if(arr[i] === "in") {arr.splice(i, 1);}
else if(arr[i] === "Be") {arr.splice(i, 1);}
else if(arr[i] === "on") {arr.splice(i, 1);}
else if(arr[i] === "by") {arr.splice(i, 1);}
else if (arr[i] === "The") {arr.splice(i, 1);}
else if(arr[i] === "and") {arr.splice(i, 1);}
else if(arr[i] === "an") {arr.splice(i, 1);}
else if (arr[i] === "All") {arr.splice(i, 1);}
else if(arr[i] === "vs") {arr.splice(i, 1);}
else if(arr[i] === "On") {arr.splice(i, 1);}
else if (arr[i] === "An") {arr.splice(i, 1);}
else if(arr[i] === "or") {arr.splice(i, 1);}
else if (arr[i] === "ja") {arr.splice(i, 1);}
else if(arr[i] === "at") {arr.splice(i, 1);}
else if (arr[i] === "via") {arr.splice(i, 1);}
else if (arr[i] === "/") {arr.splice(i, 1);}
else if (arr[i] === "-") {arr.splice(i, 1);}
else if (arr[i] === ":") {arr.splice(i, 1);}
else if (arr[i] === "..") {arr.splice(i, 1);}
else if (arr[i] === "as") {arr.splice(i, 1);}
else if (arr[i] === "are") {arr.splice(i, 1);}
else if (arr[i] === "1st") {arr.splice(i, 1);}
else if (arr[i] === "8th") {arr.splice(i, 1);}
else if (arr[i] === "True") {arr.splice(i, 1);}
}
var words = [];
var counts = {};
var words = find_duplicates(arr);
//Returns {"Item":,"Count":}
function find_duplicates(arr){
var out=[], counts={};
for (var i=0 ; i<arr.length; i++) {
var item = arr[i];
counts[item] = counts[item] >= 1 ? counts[item] + 1 : 1;
}
for (var item in counts) {
if(counts[item] > 1)
out.push({"Item": item, "Count": counts[item]});
}
return out;
}
return words;
}
function barChart(totalpubperyear){
var bc = {};
var margin = {top: 20, right: 20, bottom: 30, left: 40},
width = 500 - margin.left - margin.right,
height = 300 - margin.top - margin.bottom;
var x = d3.scale.ordinal()
.rangeRoundBands([0, width], .1)
.domain(totalpubperyear.map(function(d) { return d[0]; }));;
var y = d3.scale.linear()
.range([height, 0]);
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom");
var yAxis = d3.svg.axis()
.scale(y)
.orient("left");
var svg = area1.append("svg")
.attr("id","svg1")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
//svg.append("h2").text("Overall Publications (TAUCHI)");
x.domain(totalpubperyear.map(function(d) { return d.Year; }));
y.domain([0, d3.max(totalpubperyear, function(d) { return d.Total; })]);
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.style("font-family","sans-serif")
.style("font-size","10px")
.call(xAxis);
d3.select("#x axis").select("path")
.style("display", "none");
d3.select("#x axis").selectAll("line")
.style("fill", "none")
.style("stroke", "#000")
.style("shape-rendering", "crispEdges");
svg.append("g")
.attr("class", "y axis")
.call(yAxis)
.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", ".71em")
.style("font-family","sans-serif")
.style("font-size","10px")
.style("text-anchor", "end")
.text("Publications");
var bars = svg.selectAll(".bar")
.data(totalpubperyear)
.enter();
bars.append("rect")
.style("fill", "steelblue")
.attr("class", "bar")
.attr("x", function(d) { return x(d.Year); })
.attr("width", x.rangeBand())
.attr("y", function(d) { return y(d.Total); })
.attr("height", function(d) { return height - y(d.Total); })
.on('mouseover', mouseover)
.on("mouseout",mouseout);
//Create the total labels above the rectangles.
bars.append("text").text(function(d){ return d.Total})
.attr("x", function(d) { return x(d.Year)+x.rangeBand()/2; })
.attr("y", function(d) { return y(d.Total)-5; })
.attr("text-anchor", "middle");
function mouseover(d, i){ // utility function to be called on mouseclick.
// filter for selected year.
console.log("mouseover");
d3.select(this).style({fill:'orange'});
var yr = x.domain()[i]; //returns clicked year
var nD = [];
for (var i = 0; i < allDataJson.length; i++) {
if(allDataJson[i].Year == yr){
nD.push(
{ "Title":allDataJson[i].Title
});
}
}
var m = prepareCloudJS(nD); //returns updated words
wC.update(m);
}
function mouseout(d){ // utility function to be called on mouseout.
// reset the pie-chart and legend.
console.log("mouseout");
d3.select(this).style({fill:'steelblue'});
var newjs = [];
for(var i = 0; i < words.length; i++){
newjs.push({
"Item": words[i].Item,
"Count": words[i].Count
});
}
// words = words.map(function(d) { return [d.Item, d.Count]; });
// console.log(JSON.stringify(newjs));
wC.update(newjs);
}
return bc;
}
function wordCloud(words){
var wC = {};
var margin = {top: 20, right: 20, bottom: 30, left: 40},
width = 500 - margin.left - margin.right,
height = 300 - margin.top - margin.bottom;
var x = area1.append("svg")
.attr("id","svg2")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom);
var fill = d3.scale.category20();
var fontSize = d3.scale.log().range([10, 100]);
var wcloud = d3.layout.cloud().size([960, 600])
.words(words.map(function(d) {
return {text: d.Item, size: d.Count*4};
}))
.padding(4)
.rotate(function() { return ~~(Math.random() * 2) * 90; })
.font("Impact")
.fontSize(function(d) { return d.size; })
.on("end", draw)
.start();
function draw(words) {
x.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")")
//.attr("transform", "translate(150,150)")
.selectAll("text")
.data(words)
.enter().append("text")
.style("font-size", function(d) { return d.size + "px"; })
.style("font-family", "Impact")
.style("fill", function(d, i) { return fill(i); })
.attr("text-anchor", "middle")
.attr("transform", function(d) {
return "translate(" + [d.x, d.y] + ")rotate(" + d.rotate + ")";
})
.text(function(d) { return d.text; });
}
function drawUpdate(words){
d3.layout.cloud().size([960, 600])
.words(words)
.padding(5)
.rotate(function() { return ~~(Math.random() * 2) * 90; })
.font("Impact")
.fontSize(function(d) { return d.size; })
.start();
area1.select("#svg2")
.selectAll("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")")
.attr("transform", "translate(150,150)")
.selectAll("text")
.data(words).enter().append("text")
.style("font-size", function(d) { return d.size + "px"; })
.style("font-family", "Impact")
.style("fill", function(d, i) { return fill(i); })
.attr("transform", function(d) {
return "translate(" + [d.x, d.y] + ")rotate(" + d.rotate + ")";
})
.text(function(d) { return d.text; });
}
// Utility function to be used to update the word cloud.
wC.update = function(nD){
console.log("updated words", JSON.stringify(nD));
drawUpdate(nD);
// drawUpdate(nD);
}
return wC;
}
</script>
</body>
</html>
当我将鼠标移到多年（2011年至2015年）时，我希望更新这些年的文字云。
当我第一次将鼠标移到年份时，它会更新单词云。但是当我第二次或第三次鼠标悬停时，它将不会更新。
知道为什么会这样吗？
答案 0 :(得分：0)
有几件事：
在prepareCloudJS函数中，您将返回find_duplicates的结果，该结果似乎总是一个空数组。您似乎没有正确检查重复项，因为我可以在数据中看到应该存在重复项，但由于大小写和/或标点符号，它们未被正确检测到。
我会让您自己解决这个问题，因为它既是数据又是编码问题。但是，对于某些提示，您需要删除所有标点符号并将所有单词转换为相同的大小写以查找重复项。
当您在drawUpdate函数中重绘字云时，您没有正确遵循d3 enter, update, exit模式。迈克的thinking with joins可能会在这里提供帮助，同时也可以查看＆＃34;一般更新模式＆＃34;链接在该页面的底部。
您可能喜欢这样做：
function drawUpdate(words){
d3.layout.cloud().size([960, 600])
.words(words)
.padding(5)
.rotate(function() { return ~~(Math.random() * 2) * 90; })
.font("Impact")
.fontSize(function(d) { return d.size; })
.start();
// new variable to hold the selection
var words = area1.select("#svg2")
.selectAll("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")")
.attr("transform", "translate(150,150)");
.selectAll("text")
.data(words);
// append new text elements
words.enter().append("text");
// update all words in the word cloud (when you append
// nodes from the "enter" selection, d3 will add the new
// nodes to the "update" selection, thus all of them will
// be updated here.
words.style("font-size", function(d) { return d.size + "px"; })
.style("font-family", "Impact")
.style("fill", function(d, i) { return fill(i); })
.attr("transform", function(d) {
return "translate(" + [d.x, d.y] + ")rotate(" + d.rotate + ")";
})
.text(function(d) { return d.text; });
words.exit().remove(); // new line to remove all unused words
}