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d3.js学习6
加载server数据d3.json(url,callback)
首先准备一些json数据，将上一篇的js数据转化为json格式并存储
var data=http://www.mamicode.com/["Retail"}, {expense:15,category:"Gas"}, {expense:30,category:"Retail"}, {expense:50,category:"Dining"}, {expense:80,category:"Gas"}, {expense:65,category:"Retail"}, {expense:55,category:"Gas"}, {expense:30,category:"Dining"}, {expense:20,category:"Retail"}, {expense:10,category:"Dining"}, {expense:8,category:"Gas"}];var jsonData=http://www.mamicode.com/JSON.stringify(data);>输出结果后存储为data.json
var data=http://www.mamicode.com/[];"body") .selectAll("div.h-bar") .data(data); //enter selection.enter() .append("div") .attr("class","h-bar") .append("span"); //remove selection.exit().remove(); //update selection.attr("class","h-bar") .style("width",function(d){ return (d.expense*5)+"px"; }) .select("span") .text(function(d){ return d.category; });}//d3.json(‘url‘,callback)function load(){ d3.json("data.json",function(error,json){ data=http://www.mamicode.com/data.concat(json);>
d3.js学习6
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