Weekly Commits

## index.html
<!DOCTYPE html>
<meta charset="utf-8">
<style>
  body {
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  }

  h3 { margin: 0.25em 0; }
  h5 {
    font-style: italic;
    font-weight: 400;
    margin: 0.25em 0;
    color: #aaa;
  }

  .header {
    margin-left: 17px;
  }

  .sort-label { font-weight: 600; }
  .sort { font-size: 0.83em; }
</style>

<body>
  <div class="header">
    <h3>Weekly commits to mbostock/d3 for the past year</h3>
    <h5>hover over circles for commit counts</h5>
    <div class="sort">
      <span class="sort-label">Sort</span>
      <input name="sort-mode" type="radio" value="chron" id="sort-chron" checked><label for="horizon-mode-offset"> chronological</label>
      <input name="sort-mode" type="radio" value="count" id="sort-count"><label for="sort-count"> commit count</label>
    </div>
  </div>
  <svg width="960" height="500"></svg>
</body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/moment.js/2.8.3/moment.min.js"></script>
<script>
var url = "https://api.github.com/repos/mbostock/d3/stats/commit_activity";
var data;

var ROW_LEN = 10;
var GRID_SIZE = 70;
var MARGIN = 50;
var RECT_SIZE = 67;
function circleY(i) { return Math.ceil((i + 1) / ROW_LEN) * GRID_SIZE - RECT_SIZE / 2; }
function circleX(i) { return i % ROW_LEN * GRID_SIZE + MARGIN; }

d3.json(url, function(error, json) {
  if (error) return console.warn(error);
  data = json;
  drawCircles(data);
});

function drawCircles(data) {
  var svg = d3.select("svg");
  svg.selectAll("rect")
      .data(data)
    .enter().append("rect")
      .attr("y", function(d, i) { return Math.ceil((i + 1) / ROW_LEN) * GRID_SIZE - RECT_SIZE; })
      .attr("x", function(d, i) { return i % ROW_LEN * GRID_SIZE + MARGIN - RECT_SIZE / 2; })
      .attr("width", RECT_SIZE)
      .attr("height", RECT_SIZE)
      .style('fill', 'rgba(236, 240, 241, 1.0)');

  svg.selectAll("circle")
      .data(data)
    .enter().append("circle")
      .attr("cy", function(d, i) { return circleY(i) })
      .attr("cx", function(d, i) { return circleX(i) })
      .attr("r", function(d) { return getScaledValue(d.total) })
      .style('fill', 'rgba(231, 76, 60,1.0)')
      .append("title").text(function(d) { return formatTitle(d.total, d.week); });
}

// format title strings for tooltips
function formatTitle(commitCount, timestamp) {
    var weekStart = moment.unix(timestamp).format("MMM Do");
    return "Week of " + weekStart + "\nCommits: " + commitCount;
}

// scale circle radii so small values are visible
function getScaledValue(commitCount) {
  if (commitCount) { return commitCount * 1.4 + (20 - commitCount) / 5; }
  else { return 0; }
}

d3.selectAll("input[name=sort-mode]").on("change", function() {
  change(this.value)
});

function change(mode) {
  mode === "count"
      ? data.sort(function(a, b) { return d3.descending(a.total, b.total); })
      : data.sort(function(a, b) { return d3.ascending(a.week, b.week); });

  // find the new position of a week in the sorted data
  sorted = function(week) {
    var idx;
    data.forEach(function(d, i) {
      if (d.week === week) idx = i;
    });
    return idx;
  };

  // transition circle positions over 1 second
  var svg = d3.select("svg");
  var transition = svg.transition().duration(1000)

  transition.selectAll("circle")
      .attr("cy", function(d) { return circleY(sorted(d.week)); })
      .attr("cx", function(d) { return circleX(sorted(d.week)); })
}
</script>
	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>
	body {
	font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
	}

	h3 { margin: 0.25em 0; }
	h5 {
	font-style: italic;
	font-weight: 400;
	margin: 0.25em 0;
	color: #aaa;
	}

	.header {
	margin-left: 17px;
	}

	.sort-label { font-weight: 600; }
	.sort { font-size: 0.83em; }
	</style>

	<body>
	<div class="header">
	<h3>Weekly commits to mbostock/d3 for the past year</h3>
	<h5>hover over circles for commit counts</h5>
	<div class="sort">
	<span class="sort-label">Sort</span>
	<input name="sort-mode" type="radio" value="chron" id="sort-chron" checked><label for="horizon-mode-offset"> chronological</label>
	<input name="sort-mode" type="radio" value="count" id="sort-count"><label for="sort-count"> commit count</label>
	</div>
	</div>
	<svg width="960" height="500"></svg>
	</body>
	<script src="http://d3js.org/d3.v3.min.js"></script>
	<script src="http://cdnjs.cloudflare.com/ajax/libs/moment.js/2.8.3/moment.min.js"></script>
	<script>
	var url = "https://api.github.com/repos/mbostock/d3/stats/commit_activity";
	var data;

	var ROW_LEN = 10;
	var GRID_SIZE = 70;
	var MARGIN = 50;
	var RECT_SIZE = 67;
	function circleY(i) { return Math.ceil((i + 1) / ROW_LEN) * GRID_SIZE - RECT_SIZE / 2; }
	function circleX(i) { return i % ROW_LEN * GRID_SIZE + MARGIN; }

	d3.json(url, function(error, json) {
	if (error) return console.warn(error);
	data = json;
	drawCircles(data);
	});

	function drawCircles(data) {
	var svg = d3.select("svg");
	svg.selectAll("rect")
	.data(data)
	.enter().append("rect")
	.attr("y", function(d, i) { return Math.ceil((i + 1) / ROW_LEN) * GRID_SIZE - RECT_SIZE; })
	.attr("x", function(d, i) { return i % ROW_LEN * GRID_SIZE + MARGIN - RECT_SIZE / 2; })
	.attr("width", RECT_SIZE)
	.attr("height", RECT_SIZE)
	.style('fill', 'rgba(236, 240, 241, 1.0)');

	svg.selectAll("circle")
	.data(data)
	.enter().append("circle")
	.attr("cy", function(d, i) { return circleY(i) })
	.attr("cx", function(d, i) { return circleX(i) })
	.attr("r", function(d) { return getScaledValue(d.total) })
	.style('fill', 'rgba(231, 76, 60,1.0)')
	.append("title").text(function(d) { return formatTitle(d.total, d.week); });
	}

	// format title strings for tooltips
	function formatTitle(commitCount, timestamp) {
	var weekStart = moment.unix(timestamp).format("MMM Do");
	return "Week of " + weekStart + "\nCommits: " + commitCount;
	}

	// scale circle radii so small values are visible
	function getScaledValue(commitCount) {
	if (commitCount) { return commitCount * 1.4 + (20 - commitCount) / 5; }
	else { return 0; }
	}

	d3.selectAll("input[name=sort-mode]").on("change", function() {
	change(this.value)
	});

	function change(mode) {
	mode === "count"
	? data.sort(function(a, b) { return d3.descending(a.total, b.total); })
	: data.sort(function(a, b) { return d3.ascending(a.week, b.week); });

	// find the new position of a week in the sorted data
	sorted = function(week) {
	var idx;
	data.forEach(function(d, i) {
	if (d.week === week) idx = i;
	});
	return idx;
	};

	// transition circle positions over 1 second
	var svg = d3.select("svg");
	var transition = svg.transition().duration(1000)

	transition.selectAll("circle")
	.attr("cy", function(d) { return circleY(sorted(d.week)); })
	.attr("cx", function(d) { return circleX(sorted(d.week)); })
	}
	</script>