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javascript - 使用 d3 制作交互式散点图?

转载 作者:塔克拉玛干 更新时间:2023-11-02 20:45:30 25 4
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我有一个基于这个例子的散点图 http://bl.ocks.org/mbostock/3887118 .

我想要做的是通过允许用户选择 x 和 y 维度以及基于数据文件中的列之一的圆圈大小来添加交互性。当他们选择某些东西时,图表应该会自动缩放轴。

我该怎么做呢?到目前为止,这是我的代码:http://plnkr.co/edit/ZCdEBa79Y85Koz7MepXw?p=preview

谢谢。

<!DOCTYPE html>
<meta charset="utf-8">
<style>

/*set the axis line color, dot stroke, font size, and font position*/
body {
font: 15px sans-serif;
}

.name{
position: relative;
top: 90px;
text-align: left;
font-weight: bold;
}

.title {
position: relative;
text-align: left;
font-size: 25px;
}

.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}

.dot {
stroke: #000;
}

#filter {
position: absolute;
}

#mark {
padding-left: 150px;
position: inherit;
}

#xAXs {
position: relative;
left: 290px;
bottom: 30px;
}

#yAXs {
position: relative;
bottom: 30px;
left: 315px;

}

#label {
position: absolute;
top: 599px;
bottom: 125px;
left: 300px;
right: 0px;
}

#label2 {
position: absolute;
top: 599px;
bottom: 125px;
left: 430px;
right: 0px;
}

</style>

<body>


<script src="d3.min.js"></script>

<script>

var margin = {top: 20, right: 20, bottom: 30, left: 40},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;


var x = d3.scale.linear()
.range([0, width]);

var y = d3.scale.linear()
.range([height, 0]);


var color = d3.scale.category10();

var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom");

var yAxis = d3.svg.axis()
.scale(y)
.orient("left");


var svg = d3.select("body").append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");


d3.csv("iris.csv", function(error, data) {
data.forEach(function(d) {
d.petalLength = +d.petalLength;
d.petalWidth = +d.petalWidth;
d.sepalLength = +d.sepalLength;
d.sepalWidth = +d.sepalWidth;
});

x.domain(d3.extent(data, function(d) { return d.petalWidth; })).nice();
y.domain(d3.extent(data, function(d) { return d.petalLength; })).nice();

svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis)
.append("text")
.attr("class", "label")
.attr("x", width)
.attr("y", -6)
.style("text-anchor", "end")
.text("Petal Width (cm)");

svg.append("g")
.attr("class", "y axis")
.call(yAxis)
.append("text")
.attr("class", "label")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("Petal Length (cm)")

var circles = svg.selectAll(".dot")
.data(data)
.enter().append("circle")
.attr("class", "dot")
.attr("r", 3.5)
.attr("cx", function(d) { return x(d.petalWidth); })
.attr("cy", function(d) { return y(d.petalLength); })
.style("fill", function(d) { return color(d.species); });


var legend = svg.selectAll(".legend")
.data(color.domain())
.enter().append("g")
.attr("class", "legend")
.attr("transform", function(d, i) { return "translate(0," + i * 20 + ")"; });


legend.append("rect")
.attr("x", width - 18)
.attr("width", 18)
.attr("height", 18)
.style("fill", color);


legend.append("text")
.attr("x", width - 24)
.attr("y", 9)
.attr("dy", ".35em")
.style("text-anchor", "end")
.text(function(d) { return d; });



d3.selectAll("[name=v]").on("change", function() {
var selected = this.value;
display = this.checked ? "inline" : "none";


svg.selectAll(".dot")
.filter(function(d) {return selected == d.species;})
.attr("display", display);
});



d3.selectAll("[name=sepal]").on("change", function(d) {
radius = this.value;


svg.selectAll(".dot")
console.log(radius);
circles.attr("r", radius);
});



d3.select("[name=xAX]").on("change", function(){
xAxy = this.value;
console.log(xAxy)
})

d3.select("[name=yAX]").on("change", function(){
yAxy = this.value;
console.log(yAxy)
})

});

</script>
<br><br>


<div id="filter">
<b>Species Filter:</b>
<br>
<input name='v' value="Iris-setosa" type="checkbox" checked>Iris-setosa
</input>
<br>
<input name="v" value="Iris-versicolor" type="checkbox" checked >Iris-versicolor
</input>
<br>
<input name="v" value="Iris-virginica" type="checkbox" checked >Iris-virginica
</input>
</div>


<form id="mark">
<b>Size of Mark:</b>
<div><input type="radio" name="sepal" value='sepalWidth'>Sepal Width</div>
<div><input type="radio" name="sepal" value="sepalLength">Sepal Length</div>
</form>

<div id="label"><b>x-Axis:</b></div>
<select name="xAX" id="xAXs">
<option value ="petalWidth">petalWidth</option>
<option value ="petalLength">petalLength</option>
<option value ="sepalLength">sepalLength</option>
<option value ="sepalWidth">sepalWidth</option>
</select>

<div id="label2"><b>y-Axis:</b></div>
<select name="yAX" id="yAXs">
<option value ="petalLength">petalLength</option>
<option value ="petalWidth">petalWidth</option>
<option value ="sepalLength">sepalLength</option>
<option value ="sepalWidth">sepalWidth</option>
</select>

<br>
</body>

最佳答案

试试这个插件:http://plnkr.co/edit/MkZcXJPS7hrcWh3M0MZ1?p=preview

您快完成了,我只需要更新您的几个函数。以下介绍亮点:

d3.selectAll("[name=sepal]").on("change", function(d) {
radius = this.value;

svg.selectAll(".dot")
console.log(radius);
circles.attr("r", function(d) { return d[radius]; });
});

您正在将 radius 设置为 csv 中要从中读取半径的列,因此现在您只需更新 svg 中圆的半径>,这基本上与您最初设置它们时的方式相同。

d3.select("[name=xAX]").on("change", function(){
xAxy = this.value;
console.log(xAxy)
x.domain(d3.extent(data, function(d) { return d[xAxy]; })).nice();

svg.select(".x.axis").transition().call(xAxis);

svg.selectAll(".dot").transition().attr("cx", function(d) {
return x(d[xAxy]);
});
svg.selectAll(".x.axis").selectAll("text.label").text(axisNames[xAxy] + " (cm)");
});

d3.select("[name=yAX]").on("change", function(){
yAxy = this.value;
console.log(yAxy)
y.domain(d3.extent(data, function(d) { return d[yAxy]; })).nice();
svg.select(".y.axis").transition().call(yAxis);
svg.selectAll(".dot").transition().attr("cy", function(d) {
return y(d[yAxy]);
});
svg.selectAll(".y.axis").selectAll("text.label").text(axisNames[yAxy] + " (cm)");
});

xy 轴的变化基本上彼此相同,只是被引用的轴发生了变化。我在这里做的:

  1. 使用新范围更新域(基于 xAxyyAxy 的值)
  2. 通过设置转换并再次调用 xAxisyAxis 组件来更新 svg 中的实际轴。
  3. 更新每个.dotcxcy位置
  4. 通过在新数组 (axisNames) 中查找来更新轴上的 text,该数组给出了正在绘制的变量的 pretty-print 。

关于javascript - 使用 d3 制作交互式散点图?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/28402965/

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