结合underscore-min.js，和D3.js 绘制HTML关键词随机分布

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="./js/jquery-1.8.3.min.js"></script>
<script type="text/javascript" src="./js/underscore.js"></script>
<script type="text/javascript" src="http://t.datastory.com.cn/resources/js/lib/d3.v3.min.js?version=0.2.22"></script>
<script type="text/javascript" src="http://t.datastory.com.cn/resources/js/lib/d3.layout.cloud.js?version=0.2.22"></script>
</head>
<body>
<div id="keywordDist" style="width:400px;height:280px;"></div>
</body>
</html>
<script>
//关键词分布
frepkeywordstat();

function frepkeywordstat(){
    if (!$.support.leadingWhitespace) {
        $("#keywordDist").html("请使用Chrome浏览器以获得最佳浏览体验");
        return;
    }
    var lvalues = [];
    var keyword = "泽泽$1|文晖$2";
    
    if(keyword && keyword.length){
        var ls = keyword.split("|");
        if(ls==null||ls.length<=0){
             $("#keywordDist").html('<div style="margin-top: 140px;margin-left: 180px;">暂无数据...</div>');
            return;
        }
        $.each(ls, function(key, value){
            var items = value.split("$");
            
            if(items==null||items.length<2){
                return true;
            }
            var p = {};
            if(items.length == 2){
                p.text = items[0];
                p.size = items[1];
                lvalues.push(p);
            }else if(items.length == 3){
                p.text = items[0];
                p.size = items[2];
                lvalues.push(p);
            }
            if(lvalues.length >= 25){
                return false;
            }
        });
        
        if(!lvalues.length){        
            $("#keywordDist").html('<div style="margin-top: 140px;margin-left: 180px;">暂无数据...</div>');
            return;
        }
    }else{
        $("#keywordDist").html('<div style="margin-top: 140px;margin-left: 180px;">暂无数据...</div>');
        return;
    }
    lvalues = _.sortBy(lvalues, function(o1){return parseInt(o1.size)});
    var scale = d3.scale.linear()
        .domain([parseInt(lvalues[0].size), parseInt(lvalues[lvalues.length-1].size)])
        .range([20,45]);
    $("#keywordDist").html("");
    d3.layout.cloud().size([420, 280])
        .words(lvalues)
        .rotate(function() { return Math.ceil(Math.random()*40)-20; })
        .font("Impact")
        .fontSize(function(d) { return scale(parseInt(d.size))})
        .on("end", draw)
        .start();
}

function draw(words) {
    var fill = d3.scale.category20();
    d3.select("#keywordDist").append("svg")
        .attr("width", 420)
        .attr("height", 280)
        .append("g")
        .attr("transform", "translate(200, 160)")
        .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; })
        .style("opacity", 1e-6)
        .transition()
        .duration(1000)
        .style("opacity", 1);
}
</script>