What is the dataset that I chose? Why?
I chose to analyze the “Stack Overflow dataset” containing the different kind of tags that people are interested in and make questions in Stack Overflow website.
I found it interesting to know which kind of doubts people have.
Did you use a subset of the data? If so, what was it?
No, I used the whole available dataset. “stackoverflow.json”
Are there any particular aspects of your visualization to which you would like to bring attention?
I found interesting the different nucleus that we can see in the diagram:
1. Blue color – Tag related with internet like: css, javascript, mysql, bootstarp etc;
2. Orange color – Tags related with microsoft like asp, visual-studio, vb net etc;
3. light blue – tags related to IOS
4.red-orange – Tags related to Languages: C++, C, Python, Java
What do you think the data and your visualization show?
It shows the type of information people are searching and how they are related to each other.
The diagram:
I prepared this network diagram programming d3.v4
My d3 program
<!DOCTYPE html>
<meta charset=”utf-8″>
<head>
<style>
.links line {
stroke: #999;
stroke-opacity: 0.6;
}
.nodes circle {
stroke: #fff;
stroke-width: 1.1px;
}
text {
font-family: sans-serif;
font-size: 16px;
}
</style>
<!– Load d3.js –>
<script src=”https://d3js.org/d3.v4.js” charset=”utf-8″></script>
<script>
document.addEventListener(‘DOMContentLoaded’, function(){
// 1. set the dimensions and margins of the graph
var margin = {top: 10, right: 30, bottom: 30, left: 40},
width = 1200 – margin.left – margin.right,
height = 1200 – margin.top – margin.bottom;
// append the svg object to the body of the page
var svg = d3.select(“#graph”)
.append(“svg”)
.attr(“width”, width + margin.left + margin.right)
.attr(“height”, height + margin.top + margin.bottom)
.append(“g”)
.attr(“transform”, “translate( 300,500)”)
.attr(“transform”, “scale( 0.7,0.7)”);
// define color category
var color = d3.scaleOrdinal(d3.schemeCategory20c);
var simulation = d3.forceSimulation()
.force(“link”, d3.forceLink().id(function(d) { return d.id; }))
.force(“charge”, d3.forceManyBody())
.force(“center”, d3.forceCenter(width / 2, height / 2));
d3.json(“stackoverflow.json”, function(error, graph) {
if (error) throw error;
var link = svg.append(“g”)
.attr(“class”, “links”)
.selectAll(“line”)
.data(graph.links)
.enter().append(“line”)
.attr(“stroke-width”, function(d) { return 0.3*Math.sqrt(d.value); });
var node = svg.append(“g”)
.attr(“class”, “nodes”)
.selectAll(“g”)
.data(graph.nodes)
.enter().append(“g”)
var circles = node.append(“circle”)
.attr(“r”, 5)
.attr(“fill”, function(d) { return color(d.group); })
.call(d3.drag()
.on(“start”, dragstarted)
.on(“drag”, dragged)
.on(“end”, dragended));
var lables = node.append(“text”)
.text(function(d) {
return d.id;
})
.attr(‘x’, 6)
.attr(‘y’, 3);
node.append(“title”)
.text(function(d) { return d.id; });
simulation
.nodes(graph.nodes)
.on(“tick”, ticked);
simulation.force(“link”)
.links(graph.links)
.linkDistance(5);
function ticked() {
link
.attr(“x1”, function(d) { return d.source.x; })
.attr(“y1”, function(d) { return d.source.y; })
.attr(“x2”, function(d) { return d.target.x; })
.attr(“y2”, function(d) { return d.target.y; });
node
.attr(“transform”, function(d) {
return “translate(” + d.x + “,” + d.y + “)”;
})
}
function dragstarted(d) {
if (!d3.event.active) simulation.alphaTarget(0.3).restart();
d.fx = d.x;
d.fy = d.y;
}
function dragged(d) {
d.fx = 0.3 * d3.event.x;
d.fy = 0.3 * d3.event.y;
}
function dragended(d) {
if (!d3.event.active) simulation.alphaTarget(0);
d.fx = null;
d.fy = null;
}
// Add Title
svg.append(“text”)
.attr(“text-anchor”, “end”)
.attr(“x”, width)
.attr(“y”, height)
.text(“A”)
.style(“font-size”, “100”)
.style(“text-align”, center);
// Add Title
svg.append(“text”)
.attr(“text-anchor”, “end”)
.attr(“x”, width – 180)
.attr(“y”, 150)
.text(“showing character co-occurence in Les Misérables”)
.style(“font-size”, “24”);
});
}); // end DOMContentLoaded
</script>
</head>
<body>
<!– Create a div where the graph will take place –>
<div style=”margin: 0px auto auto 250px; color: steelblue; font-size: 20px; z-index:3;”><h2>Stack Overflow – Categories of tags questions</h2></div>
<div id=”graph” style=”z-index:1; margin-top:-40px”></div>
</body>
Data obtained from:
https://github.com/incubated-geek-cc/tableau-data-utility/blob/master/public/data/stackoverflow.json
The dataset
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{
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“nodesize”: 129.55
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“id”: “c#”,
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“nodesize”: 321.13
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“nodesize”: 47.01
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“nodesize”: 649.16
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“nodesize”: 208.29
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“nodesize”: 8.52
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“id”: “reactjs”,
“group”: 3,
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{
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“id”: “mysql”,
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“nodesize”: 117.36
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“id”: “iphone”,
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“nodesize”: 229.86
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“nodesize”: 27.02
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“id”: “ajax”,
“group”: 6,
“nodesize”: 35.41
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{
“id”: “django”,
“group”: 1,
“nodesize”: 40.91
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{
“id”: “python”,
“group”: 1,
“nodesize”: 438.67
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{
“id”: “vba”,
“group”: 14,
“nodesize”: 16.87
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{
“id”: “xcode”,
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“id”: “apache”,
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“nodesize”: 13.17
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{
“id”: “nginx”,
“group”: 5,
“nodesize”: 9.49
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{
“id”: “angularjs”,
“group”: 6,
“nodesize”: 126.59
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{
“id”: “asp.net-web-api”,
“group”: 2,
“nodesize”: 11.28
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“group”: 6,
“nodesize”: 32.12
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“group”: 5,
“nodesize”: 108.54
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“nodesize”: 18.79
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“nodesize”: 17.53
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{
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“nodesize”: 9.45
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“group”: 12,
“nodesize”: 12.22
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{
“id”: “twitter-bootstrap”,
“group”: 6,
“nodesize”: 31.05
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{
“id”: “web-services”,
“group”: 8,
“nodesize”: 18.94
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{
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“nodesize”: 27.08
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{
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“nodesize”: 8.95
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{
“id”: “selenium”,
“group”: 11,
“nodesize”: 12.7
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{
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{
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