d3.js 的饼图转换图中的输入数据未显示标签名称
Label names are not displayed from input data in pie transition chart of d3.js
我正在使用 d3.js 绘制饼图。但是当标签放置在数据数组中时,如下所示:
data = [{"label":"sector1", "value":25}, {"label":"sector2", "value":45}]
饼图将不会显示。相反,将打印“NaN”。
完整代码贴在下面:
var w = 400,
h = 400,
r = Math.min(w, h) / 2,
data = [{"label":"sector1", "value":25}, {"label":"sector2", "value":45}], // Data with label-value pairs
color = d3.scale.category20(),
arc = d3.svg.arc().outerRadius(r),
donut = d3.layout.pie();
var vis = d3.select("body").append("svg") // Place the chart in 'pie-chart-div'
.data([data])
.attr("width", w)
.attr("height", h);
var arcs = vis.selectAll("g.arc")
.data(donut)
.enter().append("g")
.attr("class", "arc")
.attr("transform", "translate(" + r + "," + r + ")");
var paths = arcs.append("path")
.attr("fill", function(d, i) { return color(i); });
var labels = arcs.append("text")
.attr("transform", function(d) { d.innerRadius = 120; return "translate(" + arc.centroid(d) + ")"; })
.attr("dy", ".35em")
.text(function(d) { return d.value; });
paths.transition()
.ease("bounce")
.duration(2000)
.attrTween("d", tweenPie);
paths.transition()
.ease("elastic")
.delay(function(d, i) { return 2000 + i * 50; })
.duration(750)
.attrTween("d", tweenDonut);
function tweenPie(b) {
b.innerRadius = 0;
var i = d3.interpolate({startAngle: 0, endAngle: 0}, b);
return function(t) {
return arc(i(t));
};
}
function tweenDonut(b) {
b.innerRadius = r * .6;
var i = d3.interpolate({innerRadius: 0}, b);
return function(t) {
return arc(i(t));
};
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>
如何在图表中显示标签名称和值?
您需要调用 donut
并包含您的数据:
data2 = data.map(function(d) { return d.value}) // [25, 45]
...
.data(donut(data2))
然后调用标签 ;
.text(function(d, i) { return data[i].label; });
我正在使用 d3.js 绘制饼图。但是当标签放置在数据数组中时,如下所示:
data = [{"label":"sector1", "value":25}, {"label":"sector2", "value":45}]
饼图将不会显示。相反,将打印“NaN”。
完整代码贴在下面:
var w = 400,
h = 400,
r = Math.min(w, h) / 2,
data = [{"label":"sector1", "value":25}, {"label":"sector2", "value":45}], // Data with label-value pairs
color = d3.scale.category20(),
arc = d3.svg.arc().outerRadius(r),
donut = d3.layout.pie();
var vis = d3.select("body").append("svg") // Place the chart in 'pie-chart-div'
.data([data])
.attr("width", w)
.attr("height", h);
var arcs = vis.selectAll("g.arc")
.data(donut)
.enter().append("g")
.attr("class", "arc")
.attr("transform", "translate(" + r + "," + r + ")");
var paths = arcs.append("path")
.attr("fill", function(d, i) { return color(i); });
var labels = arcs.append("text")
.attr("transform", function(d) { d.innerRadius = 120; return "translate(" + arc.centroid(d) + ")"; })
.attr("dy", ".35em")
.text(function(d) { return d.value; });
paths.transition()
.ease("bounce")
.duration(2000)
.attrTween("d", tweenPie);
paths.transition()
.ease("elastic")
.delay(function(d, i) { return 2000 + i * 50; })
.duration(750)
.attrTween("d", tweenDonut);
function tweenPie(b) {
b.innerRadius = 0;
var i = d3.interpolate({startAngle: 0, endAngle: 0}, b);
return function(t) {
return arc(i(t));
};
}
function tweenDonut(b) {
b.innerRadius = r * .6;
var i = d3.interpolate({innerRadius: 0}, b);
return function(t) {
return arc(i(t));
};
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>
如何在图表中显示标签名称和值?
您需要调用 donut
并包含您的数据:
data2 = data.map(function(d) { return d.value}) // [25, 45]
...
.data(donut(data2))
然后调用标签 ;
.text(function(d, i) { return data[i].label; });