A simple example of a waterfall chart using d3, showing customer retention on a week by week basis for the past month.
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April 10, 2019 08:21
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d3 Waterfall Chart
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| period | start of period | new | returned | went inactive | |
|---|---|---|---|---|---|
| Four Weeks Ago | 100 | 20 | 30 | 40 | |
| Three Weeks Ago | 110 | 30 | 20 | 30 | |
| Two Weeks Ago | 130 | 40 | 25 | 40 | |
| One Week Ago | 155 | 30 | 55 | 50 | |
| Current Week | 190 | 0 | 0 | 0 |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| body { | |
| font: 10px sans-serif; | |
| } | |
| .axis path, | |
| .axis line { | |
| fill: none; | |
| stroke: #000; | |
| shape-rendering: crispEdges; | |
| } | |
| .x.axis path { | |
| display: none; | |
| } | |
| </style> | |
| <script src="http://code.jquery.com/jquery-latest.js"></script> | |
| <body> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script> | |
| var margin = {top: 20, right: 20, bottom: 30, left: 40}, | |
| width = 960 - margin.left - margin.right, | |
| height = 500 - margin.top - margin.bottom; | |
| var x0 = d3.scale.ordinal() | |
| .rangeRoundBands([0, width], 0, .1); | |
| var x1 = d3.scale.ordinal(); | |
| var y = d3.scale.linear() | |
| .range([height, 0]); | |
| var color = d3.scale.ordinal() | |
| .range(["#2DBAD4", "#33CC33", "#00E6B8", "#C9081D"]); | |
| var xAxis = d3.svg.axis() | |
| .scale(x0) | |
| .orient("bottom"); | |
| var yAxis = d3.svg.axis() | |
| .scale(y) | |
| .orient("left") | |
| .tickFormat(d3.format(".2s")); | |
| var svg = d3.select("body").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 + ")"); | |
| d3.csv("data.csv", function(error, data) { | |
| var categories = d3.keys(data[0]).filter(function(key) { | |
| return key !== "period"; | |
| }); | |
| data.forEach(function(d) { | |
| //first calculate the starting height for each category | |
| total = 0 | |
| totals = {} | |
| for (var i=0; i<categories.length; i++) { | |
| if (i == 3) { | |
| total = total - +d[categories[i]]; | |
| totals[categories[i]] = total; | |
| } | |
| else { | |
| totals[categories[i]] = total; | |
| total += +d[categories[i]]; | |
| } | |
| } | |
| //then map category name, value, and starting height to each observation | |
| d.formatted = categories.map(function(category) { | |
| return { | |
| name: category, | |
| value: +d[category], | |
| baseHeight: +totals[category] | |
| }; | |
| }); | |
| }); | |
| x0.domain(data.map(function(d) { return d.period; })); | |
| x1.domain(categories).rangeRoundBands([0, x0.rangeBand()]); | |
| y.domain([0, d3.max(data, function(d) { | |
| return d3.max(d.formatted, function(d) { | |
| return d.value + d.baseHeight; }); })]); | |
| svg.append("g") | |
| .attr("class", "x axis") | |
| .attr("transform", "translate(0," + height + ")") | |
| .call(xAxis); | |
| svg.append("g") | |
| .attr("class", "y axis") | |
| .call(yAxis) | |
| .append("text") | |
| .attr("transform", "rotate(-90)") | |
| .attr("y", 6) | |
| .attr("dy", ".71em") | |
| .style("text-anchor", "end") | |
| .text("Customers"); | |
| var state = svg.selectAll(".state") | |
| .data(data) | |
| .enter().append("g") | |
| .attr("class", "g") | |
| .attr("transform", function(d) { | |
| return "translate(" + x0(d.period) + ",0)"; | |
| }); | |
| state.selectAll("rect") | |
| .data(function(d) { return d.formatted; }) | |
| .enter().append("rect") | |
| .attr("width", x1.rangeBand()) | |
| .attr("x", function(d) { return x1(d.name); }) | |
| .attr("y", function(d) { return y(d.value + d.baseHeight); }) | |
| .attr("height", function(d) { return height - y(d.value); }) | |
| .style("fill", function(d) { return color(d.name); }); | |
| var legend = svg.selectAll(".legend") | |
| .data(categories.slice().reverse()) | |
| .enter().append("g") | |
| .attr("class", "legend") | |
| .attr("transform", function(d, i) { | |
| return "translate(0," + i * 20 + ")"; | |
| }); | |
| legend.append("rect") | |
| .attr("x", width - 18) | |
| .attr("width", 18) | |
| .attr("height", 18) | |
| .style("fill", color); | |
| legend.append("text") | |
| .attr("x", width - 24) | |
| .attr("y", 9) | |
| .attr("dy", ".35em") | |
| .style("text-anchor", "end") | |
| .text(function(d) { return d; }); | |
| }); | |
| </script> |
Thanks for this. If anyone is looking for a v5 compatible example: https://gist.github.com/jacoduplessis/29209d40299e13d9a1aa09ce0eecf02f
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Thanks for that example!
On line 53 and 54, why is there an
append()with atransform translate? Why does it need this in order to show the vertical axis?Why I ask:
I've wrote a similar code, based on this, and that exact bit causes problems when I try to export the SVG as an image, for some reason (when getting a string from the SVG, encoding and setting as the source of an image element, the
onload()event for the image does not fire)If I remove those lines of code, the image export suddenly works, but then I can't see the vertical axis of my chart. I'm at the moment clueless why both of these things happen.
I "unchained" those two lines of code, like this, but nothing happens, the transform is not applied and the vertical axis not shown.
Why that does not work?