我开始使用这个d3.js甜甜圈图表：JSFiddle我试图将其更改为饼图而中间没有圆圈。我是d3.js的新手。我尝试了几种不同的想法但是却无法将其删除到图表中间的圆圈。感谢任何和所有帮助
这是我的代码：
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<style>
.label-text {
alignment-baseline : middle;
font-size: 12px;
font-family: arial,helvetica,"sans-serif";
fill: #393939;
}
.label-line {
stroke-width: 1;
stroke: #393939;
}
.label-circle {
fill: #393939;
}
</style>
<script src="http://d3js.org/d3.v3.min.js"></script>
</head>
<body>
<svg>
<g id="canvas">
<g id="art" />
<g id="labels" /></g>
</svg>
<script>
var data = [{
label: 'Star Wars',
instances: 207
}, {
label: 'Lost In Space',
instances: 3
}, {
label: 'the Boston Pops',
instances: 20
}, {
label: 'Indiana Jones',
instances: 150
}, {
label: 'Harry Potter',
instances: 75
}, {
label: 'Jaws',
instances: 5
}, {
label: 'Lincoln',
instances: 1
}];
svg = d3.select("svg");
canvas = d3.select("#canvas");
art = d3.select("#art");
labels = d3.select("#labels");
// Create the pie layout function.
// This function will add convenience
// data to our existing data, like
// the start angle and end angle
// for each data element.
jhw_pie = d3.layout.pie();
jhw_pie.sort(null);
jhw_pie.value(function (d) {
// Tells the layout function what
// property of our data object to
// use as the value.
return d.instances;
});
// Store our chart dimensions
cDim = {
height: 500,
width: 500,
innerRadius: 50,
outerRadius: 150,
labelRadius: 175
}
// Set the size of our SVG element
svg.attr({
height: cDim.height,
width: cDim.width
});
// This translate property moves the origin of the group's coordinate
// space to the center of the SVG element, saving us translating every
// coordinate individually.
canvas.attr("transform", "translate(" + (cDim.width / 2) + "," + (cDim.height / 2) + ")");
pied_data = jhw_pie(data);
// The pied_arc function we make here will calculate the path
// information for each wedge based on the data set. This is
// used in the "d" attribute.
pied_arc = d3.svg.arc()
.innerRadius(50)
.outerRadius(150);
// This is an ordinal scale that returns 10 predefined colors.
// It is part of d3 core.
pied_colors = d3.scale.ordinal()
.range(["#04B486", "#F2F2F2", "#F5F6CE", "#00BFFF","orange","purple","pink"]);
// Let's start drawing the arcs.
enteringArcs = art.selectAll(".wedge").data(pied_data)
.enter();
enteringArcs
.append("g")
.attr("class", "wedge")
.append("path")
.attr("d", pied_arc)
.style("fill", function (d, i) {
return pied_colors(i);
});
// Now we'll draw our label lines, etc.
enteringLabels = labels.selectAll(".label").data(pied_data).enter();
labelGroups = enteringLabels.append("g").attr("class", "label");
labelGroups.append("circle").attr({
x: 0,
y: 0,
r: 2,
fill: "#000",
transform: function (d, i) {
centroid = pied_arc.centroid(d);
return "translate(" + pied_arc.centroid(d) + ")";
},
'class': "label-circle"
});
// "When am I ever going to use this?" I said in
// 10th grade trig.
textLines = labelGroups.append("line").attr({
x1: function (d, i) {
return pied_arc.centroid(d)[0];
},
y1: function (d, i) {
return pied_arc.centroid(d)[1];
},
x2: function (d, i) {
centroid = pied_arc.centroid(d);
midAngle = Math.atan2(centroid[1], centroid[0]);
x = Math.cos(midAngle) * cDim.labelRadius;
return x;
},
y2: function (d, i) {
centroid = pied_arc.centroid(d);
midAngle = Math.atan2(centroid[1], centroid[0]);
y = Math.sin(midAngle) * cDim.labelRadius;
return y;
},
'class': "label-line"
});
textLabels = labelGroups.append("text").attr({
x: function (d, i) {
centroid = pied_arc.centroid(d);
midAngle = Math.atan2(centroid[1], centroid[0]);
x = Math.cos(midAngle) * cDim.labelRadius;
sign = (x > 0) ? 1 : -1
labelX = x + (5 * sign)
return labelX;
},
y: function (d, i) {
centroid = pied_arc.centroid(d);
midAngle = Math.atan2(centroid[1], centroid[0]);
y = Math.sin(midAngle) * cDim.labelRadius;
return y;
},
'text-anchor': function (d, i) {
centroid = pied_arc.centroid(d);
midAngle = Math.atan2(centroid[1], centroid[0]);
x = Math.cos(midAngle) * cDim.labelRadius;
return (x > 0) ? "start" : "end";
},
'class': 'label-text'
}).text(function (d) {
return d.data.label
});
alpha = 0.5;
spacing = 12;
function relax() {
again = false;
textLabels.each(function (d, i) {
a = this;
da = d3.select(a);
y1 = da.attr("y");
textLabels.each(function (d, j) {
b = this;
// a & b are the same element and don't collide.
if (a == b) return;
db = d3.select(b);
// a & b are on opposite sides of the chart and
// don't collide
if (da.attr("text-anchor") != db.attr("text-anchor")) return;
// Now let's calculate the distance between
// these elements.
y2 = db.attr("y");
deltaY = y1 - y2;
// Our spacing is greater than our specified spacing,
// so they don't collide.
if (Math.abs(deltaY) > spacing) return;
// If the labels collide, we'll push each
// of the two labels up and down a little bit.
again = true;
sign = deltaY > 0 ? 1 : -1;
adjust = sign * alpha;
da.attr("y", +y1 + adjust);
db.attr("y", +y2 - adjust);
});
});
// Adjust our line leaders here
// so that they follow the labels.
if (again) {
labelElements = textLabels[0];
textLines.attr("y2", function (d, i) {
labelForLine = d3.select(labelElements[i]);
return labelForLine.attr("y");
});
setTimeout(relax, 20)
}
}
relax();
</script>
</body>
</html>
由于
答案 0 :(得分：2)
请参阅此updated fiddle。
代码包含以下行，其中innerRadious已更改为0。
pied_arc = d3.svg.arc()
.innerRadius(00) // <- this
.outerRadius(150);
这有点误导，因为在此之前某处有一个innerRadius变量，但此时并未使用它。当你在这里时，你可能想要调整所有这些东西。