The d3.area.y1() method is used to set the y1 accessor to the argument passed to it which may be either a number or a function that returns a number, this is the second point or our upper bounds.
Syntax:
d3.area.y1(y1_point)
Parameters: This function accepts a single parameter as mentioned above and described below.
- y1_point: This parameter is a number lower bound point or a function that returns a number.
Return Value: This method returns no value.
Example 1:
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <script src= </script> </head> <body> <h1 style="text-align: center; color: green;"> neveropen </h1> <h3 style="text-align: center;"> D3.js | d3.area.y1() Method </h3> <center> <svg id="gfg" width="200" height="200"> </svg> </center> <script> var data = [ {x: 50, y: 10}, {x: 150, y: 30}, {x: 200, y: 150}, {x: 250, y: 10}, {x: 300, y: 150}, {x: 350, y: 50}, {x: 400, y: 190}]; var xScale = d3.scaleLinear().domain([0, 8]).range([25, 200]); var yScale = d3.scaleLinear().domain([0, 20]).range([200, 25]); var Gen = d3.area() .x((p) => p.x) .y0((p) => p.y*2) // Using area.y1() method .y1((p) => p.y*4); d3.select("#gfg") .append("path") .attr("d", Gen(data)) .attr("fill", "green") .attr("stroke", "black"); </script> </body> </html> |
Output:
Example 2:
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <script src= </script> </head> <body> <h1 style="text-align: center; color: green;"> neveropen </h1> <h3 style="text-align: center;"> D3.js | d3.area.y1() Method </h3> <center> <svg id="gfg" width="250" height="200"> </svg> </center> <script> var points = [ {xpoint: 25, ypoint: 150}, {xpoint: 75, ypoint: 50}, {xpoint: 100, ypoint: 150}, {xpoint: 100, ypoint: 50}, {xpoint: 200, ypoint: 150}]; var Gen = d3.area() .x((p) => p.xpoint) .y0((p) => p.ypoint/2) // Setting upper bounds .y1((p) => p.ypoint); d3.select("#gfg") .append("path") .attr("d", Gen(points)) .attr("fill", "green") .attr("stroke", "black"); </script> </body> </html> |
Output:
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