The curveLinearClosed() interpolator creates multiple lines by choosing points that create straight lines between each pair of adjacent points in the dataset. This is a closed variant which adds a straight line between the first and last point in the dataset.
Syntax:
d3.curveLinearClosed()
Parameters: This method does not accept any parameters.
Return Value: This method does not return any value.
Example 1:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src=
"https://cdnjs.cloudflare.com/ajax/libs/d3/4.2.2/d3.min.js">
</script>
</head>
<body>
<h1 style="text-align:center; color:green;">
GeeksforGeeks
</h1>
<center>
<svg id="gfg" width="200" height="200"></svg>
</center>
<script>
var data = [
{ x: 0, y: 0 },
{ x: 1, y: 3 },
{ x: 2, y: 15 },
{ x: 5, y: 15 },
{ x: 6, y: 1 },
{ x: 7, y: 5 },
{ x: 8, y: 1 }];
var xScale = d3.scaleLinear()
.domain([0, 8]).range([25, 175]);
var yScale = d3.scaleLinear()
.domain([0, 20]).range([175, 25]);
var line = d3.line()
.x((d) => xScale(d.x))
.y((d) => yScale(d.y))
// curveLinearClosed is used here
.curve(d3.curveLinearClosed);
d3.select("#gfg")
.append("path")
.attr("d", line(data))
.attr("fill", "none")
.attr("stroke", "green");
</script>
</body>
</html>
Output:
Example 2:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src=
"https://cdnjs.cloudflare.com/ajax/libs/d3/4.2.2/d3.min.js">
</script>
</head>
<body>
<h1 style="text-align:center; color:green;">
GeeksforGeeks
</h1>
<center>
<svg id="gfg" width="200"
height="200">
</svg>
</center>
<script>
var points = [
{ xpoint: 25, ypoint: 150 },
{ xpoint: 75, ypoint: 85 },
{ xpoint: 100, ypoint: 115 },
{ xpoint: 175, ypoint: 25 }];
var Gen = d3.line()
.x((p) => p.xpoint)
.y((p) => p.ypoint)
.curve(d3.curveLinearClosed);
d3.select("#gfg")
.append("path")
.attr("d", Gen(points))
.attr("fill", "none")
.attr("stroke", "green");
</script>
</body>
</html>
Output:
