Skip to content
Related Articles

Related Articles

Improve Article

D3.js curveStepAfter() method

  • Last Updated : 14 Sep, 2020
Geek Week

The step curve interpolator creates vertical and horizontal lines representing a step function. A vertical line is created for each pair of points in the dataset. For each pair of points, the vertical line is positioned at the x coordinate of the second point.

Syntax:

d3.curveStepAfter()

Parameters: This method takes no parameters

Return Value: This method returns nothing.

Example 1: 



HTML




<!DOCTYPE html>
<html>
<meta charset="utf-8">
<head>
  <title>d3.curveStepAfter()</title>
</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))
  // curveStepAfter is used
  .curve(d3.curveStepAfter);
 
d3.select("#gfg")
  .append("path")
  .attr("d", line(data))
  .attr("fill", "none")
  .attr("stroke", "green");
 
// Defining points
d3.select('#gfg')
  .selectAll('circle')
  .data(data)
  .enter()
  .append('circle')
  .attr('cx', (d) => xScale(d.x))
  .attr('cy', (d) => yScale(d.y))
  .attr('r', 3);
 
</script>
</body>
</html>

Output:

Example 2:

HTML




<!DOCTYPE html>
<html>
<meta charset="utf-8">
<head>
  <title>d3.curveStepAfter()</title>
</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.curveStepAfter);
 
d3.select("#gfg")
  .append("path")
  .attr("d", Gen(points))
  .attr("fill", "none")
  .attr("stroke", "green");
// Defining points
d3.select('#gfg')
  .selectAll('circle')
  .data(points)
  .enter()
  .append('circle')
  .attr('cx', (d) => (d.xpoint))
  .attr('cy', (d) => (d.ypoint))
  .attr('r', 3);
</script>
</body>
</html>

Output:

Hey geek! The constant emerging technologies in the world of web development always keeps the excitement for this subject through the roof. But before you tackle the big projects, we suggest you start by learning the basics. Kickstart your web development journey by learning JS concepts with our JavaScript Course. Now at it’s lowest price ever!




My Personal Notes arrow_drop_up
Recommended Articles
Page :