Question

我刚开始学习D3。在教程网站上，我找到了以下代码：

<!DOCTYPE html>
<html>
    <head>
        <script type="text/javascript" src="http://mbostock.github.com/d3/d3.js"></script>
    </head>
    <body>
    <div id="viz"></div>
    <script type="text/javascript">

    var sampleSVG = d3.select("#viz")
    .append("svg")
    .attr("width", 100)
    .attr("height", 100);    

    sampleSVG.append("circle")
    .style("stroke", "gray")
    .style("fill", "white")
    .attr("r", 40)
    .attr("cx", 50)
    .attr("cy", 50)
    .on("mouseover", function(){d3.select(this).style("fill", "aliceblue");})
    .on("mouseout", function(){d3.select(this).style("fill", "white");});

    </script>
</body>
</html>

此代码在屏幕上放置一个圆圈。我想知道有没有办法在屏幕上单独放置三个圆圈？我不是在谈论将数据绑定到图表并同时生成多个圆圈，如下面的代码所示：

var dataset = [];
var i = 0;
for( i = 0; i < 5; ++i){
     dataset.push(Math.round(Math.random() * 100));         
}
i = 0.5;
var sampleSVG = d3.select("#viz")
    .append("svg")
    .attr("width", 500)
    .attr("height", 100);        

sampleSVG.selectAll("circle")
.data(dataset)
.enter().append("circle")
.style("stroke", "gray")
.style("fill", "white")
.attr("r", 40)
.attr("cx", function(){return (i++) * 80;})
.attr("cy", 40)
.on("mouseover", function(){d3.select(this).style("fill", "aliceblue");})
.on("mouseout", function(){d3.select(this).style("fill", "white");})
.on("mousedown", animateFirstStep); //animateFirstStep is some transition() function

Answer 1

使用div ID创建一个数组并循环显示。

var tempArray = ["viz", "viz1", "viz2", "viz3"];

检查这个小提琴：http://jsfiddle.net/EhqVh/

JS

var tempArray = ["viz", "viz1", "viz2", "viz3"];
for (var i = 0; i < tempArray.length; i++) {
    var sampleSVG = d3.select("#"+tempArray)
        .append("svg")
        .attr("width", 100)
        .attr("height", 100);

    sampleSVG.append("circle")
    .style("stroke", "gray")
    .style("fill", "white")
    .attr("r", 40)
    .attr("cx", 50)
    .attr("cy", 50)
    .on("mouseover", function () {
    d3.select(this).style("fill", "aliceblue");
    })
        .on("mouseout", function () {
        d3.select(this).style("fill", "white");
    });
}

HTML

<div id="viz"></div>

使用D3创建三个圆圈

1 个答案: