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D3.js curveCardinal() Method
  • Last Updated : 09 Sep, 2020

The curveCardinal() method produces a cubic cardinal spline. The curve is also based on these cubic cardinal splines.

Syntax:

d3.curveCardinal()

Parameters: This method does not accept any parameters.

Return Value: This method does not return any value.

Example 1: 



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<!DOCTYPE html>
<html>
<meta charset="utf-8">
  
<head>
    <script src=
    </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))
            .curve(d3.curveCardinal);
  
        d3.select("#gfg")
            .append("path")
            .attr("d", line(data))
            .attr("fill", "none")
            .attr("stroke", "green");
    </script>
</body>
  
</html>

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Output:

Example 2:

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<!DOCTYPE html>
<html>
<meta charset="utf-8">
  
<head>
    <script src=
    </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 },
            { xpoint: 200, ypoint: 150 }];
  
        var Gen = d3.line()
            .x((p) => p.xpoint)
            .y((p) => p.ypoint)
            .curve(d3.curveCardinal);
  
        d3.select("#gfg")
            .append("path")
            .attr("d", Gen(points))
            .attr("fill", "none")
            .attr("stroke", "green");
    </script>
</body>
  
</html>

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Output:

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