The pie.value() function is used to set the value property of the data returned by the pie generator function. If the value is specified then it sets the value to the given dynamic or static function or the number.
Syntax:
pie.value([value]);
Parameters: This function accepts a single parameter as mentioned above and described below.
- value: This parameter takes a function or a number.
Return Values: This function does not return anything.
Example 1:
HTML
<!DOCTYPE html> < html lang = "en" >
< head >
< meta charset = "UTF-8" />
< meta property = "viewport" content =
"width=device-width,initial-scale=1.0" />
<!--Fetching from CDN of D3.js -->
</ script >
</ head >
< body >
< div style = "width:300px; height:300px;" >
< center >
< h1 style = "color:green" >
GeeksforGeeks
</ h1 >
< h2 >
pie.value()
</ h2 >
< h3 >
When given data array
consists objects
</ h3 >
</ center >
< svg width = "300" height = "300" >
</ svg >
</ div >
< script >
// Data to be added in the pie chart
var data = [
{ "value": 1, "property": "p1" },
{ "value": 2, "property": "p2" },
{ "value": 3, "property": "p3" },
{ "value": 4, "property": "p4" },
{ "value": 5, "property": "p5" },
{ "value": 6, "property": "p6" }
]
// Selecting SVG using d3.select()
var svg = d3.select("svg");
// Creating Pie generator
var pie = d3.pie()
// Use of pie.value() Function
.value((d) => { return d.value });
// Creating arc
var arc = d3.arc()
.innerRadius(0)
.outerRadius(100);
let g = svg.append("g")
.attr("transform", "translate(150, 120)");
// Grouping different arcs
var arcs = g.selectAll("arc")
.data(pie(data))
.enter()
.append("g");
// Appending path
arcs.append("path")
.attr("fill", (data, i) => {
return d3.schemeSet2[i];
})
.attr("d", arc);
</ script >
</ body >
</ html >
|
Output:
Example 2:
HTML
<!DOCTYPE html> < html lang = "en" >
< head >
< meta charset = "UTF-8" />
< meta property = "viewport" content =
"width=device-width, initial-scale=1.0" />
<!--Fetching from CDN of D3.js -->
</ script >
</ head >
< body >
< div style = "width:300px; height:300px;" >
< center >
< h1 style = "color:green" >
GeeksforGeeks
</ h1 >
< h2 >
pie.value()
</ h2 >
< h3 >
When given data array
consists objects
</ h3 >
</ center >
< svg width = "300" height = "300" >
</ svg >
</ div >
< script >
// Data to be added in the pie chart
var data = [
{ "value": 1, "property": "p1" },
{ "value": 2, "property": "p2" },
{ "value": 3, "property": "p3" },
{ "value": 4, "property": "p4" },
{ "value": 5, "property": "p5" },
{ "value": 6, "property": "p6" }
]
// Selecting SVG using d3.select()
var svg = d3.select("svg");
// Creating Pie generator
var pie = d3.pie()
// Use of pie.value() Function
.value((d) => { return d.value })
(data);
// Creating arc
var arc = d3.arc()
.innerRadius(50)
.outerRadius(100);
let g = svg.append("g")
.attr("transform", "translate(150, 120)");
// Grouping different arcs
var arcs = g.selectAll("arc")
.data(pie)
.enter()
.append("g");
// Appending path
arcs.append("path")
.attr("fill", (data, i) => {
return d3.schemeSet2[i];
})
.attr("d", arc);
arcs.append("text")
.attr("transform", (d) => {
return "translate(" +
arc.centroid(d) + ")";
})
.text(function (d) {
return d.value;
});
</ script >
</ body >
</ html >
|
Output: