Utilizing the D3 API, I am able to showcase link analysis where various data points are interconnected.
Initially, I managed to display these relationships by hardcoding them within the JSP file alongside the API implementation.
However, the challenge arises when I attempt to load data from an external JSON file using
d3.json("Link.json", error, data)Below is the code snippet depicting my current progress and future goals...
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<style>
/* CSS Document */
.link10 {
stroke: #000;
stroke-width: 2px;
}
.link1 {
stroke: #000;
stroke-width: 2px;
}
// Rest of the CSS styles omitted for brevity
</style>
<script src="http://d3js.org/d3.v2.js?2.9.1"></script>
<script type="text/javascript"
src="https://ajax.googleapis.com/ajax/libs/jquery/1.8/jquery.min.js"></script>
</head>
<body>
<script>
// JavaScript logic and D3 API integration goes here
</script>
</body>
</html>
The above code represents what is currently functional...
Next, let's take a look at the JSON file named Link.json that I have created:
{
// JSON data representing nodes and links
}
After creating the JSON file, I made changes in the API call to load data from Link.json:
d3.json("Link.json", function(error,data) {
var force = self.force = d3.layout.force().nodes(data.nodes).links(
data.links).linkDistance(function(d) {
return (d.distance * 10);
})
//.friction(0.5)
.charge(-250).size([ w, h ]).start();
This highlights the steps taken to switch to loading data from Link.json via the API. However, an error message stating "Uncaught TypeError: Cannot read property 'nodes' of undefined" is being encountered. Any guidance on resolving this issue would be greatly appreciated.