Skip to content

Instantly share code, notes, and snippets.

@cemo
Forked from tommaybe/LICENSE.md
Last active Jan 23, 2019
Embed
What would you like to do?
Day / Hour Heatmap

Inspired by Trulia Trends - but with code and using SVG.

Example data shows concurrent user sessions over time, taken from a development environment.

MIT Licensed, see LICENSE.MD.

day hour value
1 1 16
1 2 20
1 3 0
1 4 0
1 5 0
1 6 2
1 7 0
1 8 9
1 9 25
1 10 49
1 11 57
1 12 61
1 13 37
1 14 66
1 15 70
1 16 55
1 17 51
1 18 55
1 19 17
1 20 20
1 21 9
1 22 4
1 23 0
1 24 12
2 1 6
2 2 2
2 3 0
2 4 0
2 5 0
2 6 2
2 7 4
2 8 11
2 9 28
2 10 49
2 11 51
2 12 47
2 13 38
2 14 65
2 15 60
2 16 50
2 17 65
2 18 50
2 19 22
2 20 11
2 21 12
2 22 9
2 23 0
2 24 13
3 1 5
3 2 8
3 3 8
3 4 0
3 5 0
3 6 2
3 7 5
3 8 12
3 9 34
3 10 43
3 11 54
3 12 44
3 13 40
3 14 48
3 15 54
3 16 59
3 17 60
3 18 51
3 19 21
3 20 16
3 21 9
3 22 5
3 23 4
3 24 7
4 1 0
4 2 0
4 3 0
4 4 0
4 5 0
4 6 2
4 7 4
4 8 13
4 9 26
4 10 58
4 11 61
4 12 59
4 13 53
4 14 54
4 15 64
4 16 55
4 17 52
4 18 53
4 19 18
4 20 3
4 21 9
4 22 12
4 23 2
4 24 8
5 1 2
5 2 0
5 3 8
5 4 2
5 5 0
5 6 2
5 7 4
5 8 14
5 9 31
5 10 48
5 11 46
5 12 50
5 13 66
5 14 54
5 15 56
5 16 67
5 17 54
5 18 23
5 19 14
5 20 6
5 21 8
5 22 7
5 23 0
5 24 8
6 1 2
6 2 0
6 3 2
6 4 0
6 5 0
6 6 0
6 7 4
6 8 8
6 9 8
6 10 6
6 11 14
6 12 12
6 13 9
6 14 14
6 15 0
6 16 4
6 17 7
6 18 6
6 19 0
6 20 0
6 21 0
6 22 0
6 23 0
6 24 0
7 1 7
7 2 6
7 3 0
7 4 0
7 5 0
7 6 0
7 7 0
7 8 0
7 9 0
7 10 0
7 11 2
7 12 2
7 13 5
7 14 6
7 15 0
7 16 4
7 17 0
7 18 2
7 19 10
7 20 7
7 21 0
7 22 19
7 23 9
7 24 4
day hour value
1 1 88
1 2 20
1 3 44
1 4 0
1 5 33
1 6 2
1 7 0
1 8 9
1 9 25
1 10 1
1 11 57
1 12 61
1 13 22
1 14 25
1 15 7
1 16 55
1 17 51
1 18 4
1 19 17
1 20 20
1 21 4
1 22 4
1 23 6
1 24 12
2 1 6
2 2 22
2 3 0
2 4 0
2 5 33
2 6 5
2 7 4
2 8 8
2 9 28
2 10 99
2 11 51
2 12 66
2 13 38
2 14 39
2 15 60
2 16 22
2 17 65
2 18 50
2 19 22
2 20 11
2 21 12
2 22 9
2 23 33
2 24 13
3 1 5
3 2 8
3 3 44
3 4 0
3 5 12
3 6 2
3 7 5
3 8 12
3 9 34
3 10 43
3 11 54
3 12 44
3 13 40
3 14 48
3 15 54
3 16 59
3 17 60
3 18 51
3 19 21
3 20 16
3 21 9
3 22 5
3 23 24
3 24 7
4 1 22
4 2 33
4 3 102
4 4 33
4 5 0
4 6 2
4 7 4
4 8 13
4 9 26
4 10 58
4 11 61
4 12 59
4 13 53
4 14 54
4 15 64
4 16 55
4 17 52
4 18 53
4 19 18
4 20 3
4 21 9
4 22 12
4 23 2
4 24 8
5 1 2
5 2 0
5 3 8
5 4 2
5 5 0
5 6 2
5 7 4
5 8 14
5 9 31
5 10 48
5 11 46
5 12 50
5 13 66
5 14 54
5 15 56
5 16 67
5 17 54
5 18 23
5 19 14
5 20 6
5 21 8
5 22 7
5 23 0
5 24 84
6 1 11
6 2 22
6 3 33
6 4 44
6 5 4
6 6 0
6 7 4
6 8 8
6 9 8
6 10 6
6 11 14
6 12 12
6 13 9
6 14 14
6 15 0
6 16 4
6 17 7
6 18 6
6 19 42
6 20 5
6 21 77
6 22 32
6 23 41
6 24 0
7 1 7
7 2 6
7 3 11
7 4 22
7 5 33
7 6 44
7 7 66
7 8 5
7 9 33
7 10 0
7 11 2
7 12 2
7 13 44
7 14 6
7 15 0
7 16 4
7 17 33
7 18 2
7 19 10
7 20 7
7 21 0
7 22 19
7 23 9
7 24 4
<!DOCTYPE html>
<meta charset="utf-8">
<html>
<head>
<style>
rect.bordered {
stroke: #E6E6E6;
stroke-width:2px;
}
text.mono {
font-size: 9pt;
font-family: Consolas, courier;
fill: #aaa;
}
text.axis-workweek {
fill: #000;
}
text.axis-worktime {
fill: #000;
}
</style>
<script src="http://d3js.org/d3.v3.js"></script>
</head>
<body>
<div id="chart"></div>
<div id="dataset-picker">
</div>
<script type="text/javascript">
var margin = { top: 50, right: 0, bottom: 100, left: 30 },
width = 960 - margin.left - margin.right,
height = 430 - margin.top - margin.bottom,
gridSize = Math.floor(width / 24),
legendElementWidth = gridSize*2,
buckets = 9,
colors = ["#ffffd9","#edf8b1","#c7e9b4","#7fcdbb","#41b6c4","#1d91c0","#225ea8","#253494","#081d58"], // alternatively colorbrewer.YlGnBu[9]
days = ["Pz", "Tu", "We", "Th", "Fr", "Sa", "Su"],
times = ["1a", "2a", "3a", "4a", "5a", "6a", "7a", "8a", "9a", "10a", "11a", "12a", "1p", "2p", "3p", "4p", "5p", "6p", "7p", "8p", "9p", "10p", "11p", "12p"];
datasets = ["data.tsv", "data2.tsv"];
var svg = d3.select("#chart").append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var dayLabels = svg.selectAll(".dayLabel")
.data(days)
.enter().append("text")
.text(function (d) { return d; })
.attr("x", 0)
.attr("y", function (d, i) { return i * gridSize; })
.style("text-anchor", "end")
.attr("transform", "translate(-6," + gridSize / 1.5 + ")")
.attr("class", function (d, i) { return ((i >= 0 && i <= 4) ? "dayLabel mono axis axis-workweek" : "dayLabel mono axis"); });
var timeLabels = svg.selectAll(".timeLabel")
.data(times)
.enter().append("text")
.text(function(d) { return d; })
.attr("x", function(d, i) { return i * gridSize; })
.attr("y", 0)
.style("text-anchor", "middle")
.attr("transform", "translate(" + gridSize / 2 + ", -6)")
.attr("class", function(d, i) { return ((i >= 7 && i <= 16) ? "timeLabel mono axis axis-worktime" : "timeLabel mono axis"); });
var heatmapChart = function(tsvFile) {
d3.tsv(tsvFile,
function(d) {
return {
day: +d.day,
hour: +d.hour,
value: +d.value
};
},
function(error, data) {
var colorScale = d3.scale.quantile()
.domain([0, buckets - 1, d3.max(data, function (d) { return d.value; })])
.range(colors);
var cards = svg.selectAll(".hour")
.data(data, function(d) {return d.day+':'+d.hour;});
cards.append("title");
cards.enter().append("rect")
.attr("x", function(d) { return (d.hour - 1) * gridSize; })
.attr("y", function(d) { return (d.day - 1) * gridSize; })
.attr("rx", 4)
.attr("ry", 4)
.attr("class", "hour bordered")
.attr("width", gridSize + 8)
.attr("height", gridSize)
.style("fill", colors[0]);
cards.transition().duration(1000)
.style("fill", function(d) { return colorScale(d.value); });
cards.select("title").text(function(d) { return d.value; });
cards.exit().remove();
var legend = svg.selectAll(".legend")
.data([0].concat(colorScale.quantiles()), function(d) { return d; });
legend.enter().append("g")
.attr("class", "legend");
legend.append("rect")
.attr("x", function(d, i) { return legendElementWidth * i; })
.attr("y", height)
.attr("width", legendElementWidth)
.attr("height", gridSize / 2)
.style("fill", function(d, i) { return colors[i]; });
legend.append("text")
.attr("class", "mono")
.text(function(d) { return "≥ " + Math.round(d); })
.attr("x", function(d, i) { return legendElementWidth * i; })
.attr("y", height + gridSize);
legend.exit().remove();
});
};
heatmapChart(datasets[0]);
var datasetpicker = d3.select("#dataset-picker").selectAll(".dataset-button")
.data(datasets);
datasetpicker.enter()
.append("input")
.attr("value", function(d){ return "Dataset " + d })
.attr("type", "button")
.attr("class", "dataset-button")
.on("click", function(d) {
heatmapChart(d);
});
</script>
</body>
</html>

Copyright (c) 2016, Tom May

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment