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D3.js curveBasis() method

Last Updated : 14 Sep, 2020
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The basis curve interpolator produces cubic basis splines where the points provided to the generators are used as control points. There is a curve in the line based on the cubic splines. 

Syntax:

d3.curveBasis()

Parameters: This method takes no parameters

Return Value: This method returns nothing.

Example 1: 

HTML




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






                        










Output:




Example 2:




HTML














                                    




                                    

                                    




                                    




                                    

                                    

                                    
                                




















<!DOCTYPE html> 


<html> 


<meta charset="utf-8"> 


  


<head> 


    <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.curveBasis); 


  


        d3.select("#gfg") 


            .append("path") 


            .attr("d", Gen(points)) 


            .attr("fill", "none") 


            .attr("stroke", "green"); 


    </script> 


</body> 


  


</html> 



















                        







                        










Output:





                            
                            
                        


                                                                              

                                        

                                                                                

                                                                

                            
                                

                                
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                                        D3.js curveBasisClosed() Method
                                    

                                

                                                        

                        

                            

                                        

                                            

                                                

                                                

                                                    
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                                                    taran910                                                

                                                

                                                

            
                                            

                                            
                                        

                                        

                                            
                                            

                                                
                                                
                                            

                                            
                                                                            

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