emeeks/index.html

## readme.md

      
    Raw
  

              readme.md
            
          
    This is the code for Chapter 2, Figure 22 from D3.js in Action that nests data using d3.nest() and then represents the nested data as a bar chart by first computing the length of the nested data arrays and using that length to size the bars by.

  
## index.html
<html>
<head>
  <title>D3 in Action Chapter 2 - Example 10</title>
  <meta charset="utf-8" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
</head>
<style>
  svg {
    height: 500px;
    width: 500px;
    border: 1px solid gray;
  }
</style>
<body>

<div>
  <svg>
  </svg>
</div>
</body>
  <footer>

<script>
d3.json("tweets.json",function(error,data) {dataViz(data.tweets)});
function dataViz(incomingData) {

var nestedTweets = d3.nest()
.key(function (el) {return el.user})
.entries(incomingData);

nestedTweets.forEach(function (el) {
el.numTweets = el.values.length
})

var maxTweets = d3.max(nestedTweets, function(el) {return el.numTweets});

var yScale = d3.scale.linear().domain([0,maxTweets]).range([0,100]);

d3.select("svg")
.selectAll("rect")
.data(nestedTweets)
.enter()
.append("rect")
.attr("width", 50)
.attr("height", function(d) {return yScale(d.numTweets)})
.attr("x", function(d,i) {return i * 60})
.attr("y", function(d) {return 100 - yScale(d.numTweets)})
.style("fill", "blue")
.style("stroke", "red")
.style("stroke-width", "1px").style("opacity", .25)
}


</script>
  </footer>

</html>

## thumbnail.png

      
    Raw
  

              thumbnail.png
            
          
## tweets.json
{
"tweets": [
{"user": "Al", "content": "I really love seafood.", "timestamp": " Mon Dec 23 2013 21:30 GMT-0800 (PST)", "retweets": ["Raj","Pris","Roy"], "favorites": ["Sam"]},
{"user": "Al", "content": "I take that back, this doesn't taste so good.", "timestamp": "Mon Dec 23 2013 21:55 GMT-0800 (PST)", "retweets": ["Roy"], "favorites": []},
{"user": "Al", "content": "From now on, I'm only eating cheese sandwiches.", "timestamp": "Mon Dec 23 2013 22:22 GMT-0800 (PST)", "retweets": [], "favorites": ["Roy","Sam"]},
{"user": "Roy", "content": "Great workout!", "timestamp": " Mon Dec 23 2013 7:20 GMT-0800 (PST)", "retweets": [], "favorites": []},
{"user": "Roy", "content": "Spectacular oatmeal!", "timestamp": " Mon Dec 23 2013 7:23 GMT-0800 (PST)", "retweets": [], "favorites": []},
{"user": "Roy", "content": "Amazing traffic!", "timestamp": " Mon Dec 23 2013 7:47  GMT-0800 (PST)", "retweets": [], "favorites": []},
{"user": "Roy", "content": "Just got a ticket for texting and driving!", "timestamp": " Mon Dec 23 2013 8:05 GMT-0800 (PST)", "retweets": [], "favorites": ["Sam", "Sally", "Pris"]},
{"user": "Pris", "content": "Going to have some boiled eggs.", "timestamp": " Mon Dec 23 2013 18:23 GMT-0800 (PST)", "retweets": [], "favorites": ["Sally"]},
{"user": "Pris", "content": "Maybe practice some gymnastics.", "timestamp": " Mon Dec 23 2013 19:47  GMT-0800 (PST)", "retweets": [], "favorites": ["Sally"]},
{"user": "Sam", "content": "@Roy Let's get lunch", "timestamp": " Mon Dec 23 2013 11:05 GMT-0800 (PST)", "retweets": ["Pris"], "favorites": ["Sally", "Pris"]}
]
}
	<html>
	<head>
	<title>D3 in Action Chapter 2 - Example 10</title>
	<meta charset="utf-8" />
	<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
	</head>
	<style>
	svg {
	height: 500px;
	width: 500px;
	border: 1px solid gray;
	}
	</style>
	<body>

	<div>
	<svg>
	</svg>
	</div>
	</body>
	<footer>

	<script>
	d3.json("tweets.json",function(error,data) {dataViz(data.tweets)});
	function dataViz(incomingData) {

	var nestedTweets = d3.nest()
	.key(function (el) {return el.user})
	.entries(incomingData);

	nestedTweets.forEach(function (el) {
	el.numTweets = el.values.length
	})

	var maxTweets = d3.max(nestedTweets, function(el) {return el.numTweets});

	var yScale = d3.scale.linear().domain([0,maxTweets]).range([0,100]);

	d3.select("svg")
	.selectAll("rect")
	.data(nestedTweets)
	.enter()
	.append("rect")
	.attr("width", 50)
	.attr("height", function(d) {return yScale(d.numTweets)})
	.attr("x", function(d,i) {return i * 60})
	.attr("y", function(d) {return 100 - yScale(d.numTweets)})
	.style("fill", "blue")
	.style("stroke", "red")
	.style("stroke-width", "1px").style("opacity", .25)
	}


	</script>
	</footer>

	</html>
	{
	"tweets": [
	{"user": "Al", "content": "I really love seafood.", "timestamp": " Mon Dec 23 2013 21:30 GMT-0800 (PST)", "retweets": ["Raj","Pris","Roy"], "favorites": ["Sam"]},
	{"user": "Al", "content": "I take that back, this doesn't taste so good.", "timestamp": "Mon Dec 23 2013 21:55 GMT-0800 (PST)", "retweets": ["Roy"], "favorites": []},
	{"user": "Al", "content": "From now on, I'm only eating cheese sandwiches.", "timestamp": "Mon Dec 23 2013 22:22 GMT-0800 (PST)", "retweets": [], "favorites": ["Roy","Sam"]},
	{"user": "Roy", "content": "Great workout!", "timestamp": " Mon Dec 23 2013 7:20 GMT-0800 (PST)", "retweets": [], "favorites": []},
	{"user": "Roy", "content": "Spectacular oatmeal!", "timestamp": " Mon Dec 23 2013 7:23 GMT-0800 (PST)", "retweets": [], "favorites": []},
	{"user": "Roy", "content": "Amazing traffic!", "timestamp": " Mon Dec 23 2013 7:47 GMT-0800 (PST)", "retweets": [], "favorites": []},
	{"user": "Roy", "content": "Just got a ticket for texting and driving!", "timestamp": " Mon Dec 23 2013 8:05 GMT-0800 (PST)", "retweets": [], "favorites": ["Sam", "Sally", "Pris"]},
	{"user": "Pris", "content": "Going to have some boiled eggs.", "timestamp": " Mon Dec 23 2013 18:23 GMT-0800 (PST)", "retweets": [], "favorites": ["Sally"]},
	{"user": "Pris", "content": "Maybe practice some gymnastics.", "timestamp": " Mon Dec 23 2013 19:47 GMT-0800 (PST)", "retweets": [], "favorites": ["Sally"]},
	{"user": "Sam", "content": "@Roy Let's get lunch", "timestamp": " Mon Dec 23 2013 11:05 GMT-0800 (PST)", "retweets": ["Pris"], "favorites": ["Sally", "Pris"]}
	]
	}