D3.js Placing Text Over Arcs In A Donut Chart
I am trying to place text over a donut chart with inner rings created with D3. The plunker code can be accessed here: plunker For placing the text over the arcs, I want to access t
Solution 1:
To add label to the center of the arc you need to add the label to the centroid.
gs.selectAll('text').data(function(d) {
returnpie(d);
})
.enter().append("text")
.attr("transform", function(d, i, j) {//calculating the d as done in the path
k = arc.innerRadius(30 + donutWidth * j).outerRadius(donutWidth * (j + 1))(d);;
return"translate(" + arc.centroid(d) + ")";
})
.attr("dy", ".35em")
.style("text-anchor", "middle")
.text(function(d) {
return d.data;
});
Working code here
Hope this helps!
Solution 2:
You will have to group the arc paths and labels.
var gs = chart1.selectAll("g").data(donutData).enter().append("g");
var groups = gs.selectAll('.arc') //Created groups
.data(function(d) {
returnpie(d);
})
.enter().append("g").classed("arc", true);
path = groups.append('path') //Append paths
.attr('d', function(d, i, j) {
return arc.innerRadius(30 + donutWidth * j).outerRadius(donutWidth * (j + 1))(d);
})
.attr('fill', function(d, i) {
returncolor(i);
})
.on("mouseover", function(d) {
d3.select(this).select("path").transition()
.duration(200)
.attr("d", arcOver);
})
.on("mouseout", function(d) {
d3.select(this).select("path").transition()
.duration(100)
.attr("d", arc);
});
groups.append("text") //Add labels
.attr("transform", function(d, i, j) {
var arc1 = arc.innerRadius(30 + donutWidth * j).outerRadius(donutWidth * (j + 1));
return"translate(" + arc1.centroid(d) + ")";
})
.attr("dy", ".35em")
.attr("text-anchor", "middle")
.text(function(d, i) {
return d.data
});
// Code goes here
(function() {
var margin = {
top: 30,
right: 30,
bottom: 70,
left: 40
},
width = 580 - margin.left - margin.right,
height = 560 - margin.top - margin.bottom,
donutWidth = 100
inner = 70;
radius = Math.min(width, height) / 2;
var color = d3.scale.category10();
var pie = d3.layout.pie()
//.value(function(d){ return d.count;})
.sort(null);
var arc = d3.svg.arc();
//.innerRadius(radius - donutWidth)//.outerRadius(radius - 50);var arcOver = d3.svg.arc()
.innerRadius(inner + 5)
.outerRadius(radius + 5);
var chart1 = d3.select("#chartArea1").append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + width / 2 + "," + height / 2 + ")");
/* d3.csv("data.csv", function(error, data) {
if (error) throw error;*/var data = [{
"Class": "Class A",
"Actual_Class": 495,
"Predicted_Class": 495,
"Accuracy": 100
}, {
"Class": "Class B",
"Actual_Class": 495,
"Predicted_Class": 492,
"Accuracy": 99
}, {
"Class": "Class C",
"Actual_Class": 495,
"Predicted_Class": 495,
"Accuracy": 100
}, {
"Class": "Class D",
"Actual_Class": 495,
"Predicted_Class": 495,
"Accuracy": 100
}, {
"Class": "Class E",
"Actual_Class": 495,
"Predicted_Class": 495,
"Accuracy": 100
}];
var donutData = newArray,
actualValues = newArray,
predValues = newArray;
data.forEach(function(d) {
actualValues.push(d.Actual_Class);
predValues.push(d.Predicted_Class);
});
console.log(data);
donutData.push(actualValues);
donutData.push(predValues);
console.log(donutData);
var gs = chart1.selectAll("g").data(donutData).enter().append("g");
var groups = gs.selectAll('.arc')
.data(function(d) {
returnpie(d);
})
.enter().append("g").classed("arc", true);
path = groups.append('path')
.attr('d', function(d, i, j) {
return arc.innerRadius(30 + donutWidth * j).outerRadius(donutWidth * (j + 1))(d);
})
.attr('fill', function(d, i) {
returncolor(i);
})
.on("mouseover", function(d) {
d3.select(this).select("path").transition()
.duration(200)
.attr("d", arcOver);
})
.on("mouseout", function(d) {
d3.select(this).select("path").transition()
.duration(100)
.attr("d", arc);
});
groups.append("text")
.attr("transform", function(d, i, j) {
var arc1 = arc.innerRadius(30 + donutWidth * j).outerRadius(donutWidth * (j + 1));
return"translate(" + arc1.centroid(d) + ")";
})
.attr("dy", ".35em")
.attr("text-anchor", "middle")
.text(function(d, i) {
return d.data
});
var legend = chart1.selectAll(".legend")
.data(color.domain().slice()) //.reverse())
.enter().append("g")
.attr("class", "legend")
.attr("transform", function(d, i) {
return"translate(0," + i * 20 + ")";
});
legend.append("rect")
.attr("x", 190)
.attr("y", -(margin.top) * 7 - 8)
.attr("width", 18)
.attr("height", 18)
.style("fill", color);
legend.append("text")
.attr("x", margin.right * 7)
.attr("y", -(margin.top) * 7)
.attr("dy", ".35em")
.text(function(d, i) {
return data[i].Class;
});
// });
})();
<scriptsrc="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script><divid="chartArea1"></div>
Post a Comment for "D3.js Placing Text Over Arcs In A Donut Chart"