The d3.voronoi() function in D3.js is used to create a new Voronoi diagram layout with the default x and y accessors and a null extent. The Voronoi diagram is drawn using a set of data points that can be specified later.
Syntax:
d3.voronoi()
Parameters: This function does not accept any parameters.
The example below demonstrates the d3.voronoi() function:
Example:
HTML
<!DOCTYPE html> <html> <head>   <script src=   </script>   <script src=   </script> </head> <body>   <h1 style="color:green">     neveropen   </h1>     <script>           // Import the CSV data for     // specifying the Voronoi     d3.csv("data.csv",            function (error, data) {       var svg = d3.select("body")         .append("svg")         .attr("height", 400)         .attr("width", 400)         .append("g")         .attr("transform",               "translate(" + 20 +               "," + -20 + ")");         var y = d3.scaleLinear()         .domain([2, 20])         .range([400, 0]);       var x = d3.scaleLinear()         .domain([2, 15])         .range([0, 400]);       svg.append("g")         .call(d3.axisLeft(y));         svg.append("g")         .attr("transform",               "translate(0," + 400 + ")")         .call(d3.axisBottom(x));         // Using the d3.voronoi() function       // to create a Voronoi diagram       var voronoi = d3.voronoi()         .x(function (d) { return x(d.x); })         .y(function (d) { return y(d.y); })         .extent([[0, 0], [400, 400]]);         // Adding data to represent the Voronoi       // and displaying it       svg.append("g").selectAll("path")         .data(voronoi(data).polygons())         .enter()         .append("path")         .attr("d", (d) =>               { return d ?                 ("M" + d.join("L") +                  "Z") : null; })         .attr("fill", "green")         .attr("stroke", "black");     });   </script> </body> </html> |
Output:
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