This example, using satirical data from The Onion, demonstrates how to wrap long axis labels to fit on multiple lines.
Note: The second point is not recommended practice but serves to ilustrate the variable wrap feature!
| name | value | |
|---|---|---|
| Family in feud with Zuckerbergs | .17 | |
| Committed 671 birthdays to memory | .19 | |
| Ex is doing too well | .10 | |
| High school friends all dead now | .15 | |
| Discovered how to “like” things mentally | .27 | |
| Not enough politics | .12 |
| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>Wrapping Long Labels</title> | |
| <style> | |
| .bar { | |
| fill: steelblue; | |
| } | |
| .bar:hover { | |
| fill: brown; | |
| } | |
| .title { | |
| font: bold 14px "Helvetica Neue", Helvetica, Arial, sans-serif; | |
| } | |
| .axis { | |
| font: 10px sans-serif; | |
| } | |
| .axis path, | |
| .axis line { | |
| fill: none; | |
| stroke: #000; | |
| shape-rendering: crispEdges; | |
| } | |
| .x.axis path { | |
| display: none; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script> | |
| <script> | |
| var margin = {top: 80, right: 180, bottom: 80, left: 180}, | |
| width = 960 - margin.left - margin.right, | |
| height = 500 - margin.top - margin.bottom; | |
| var padding = 0.1, outerPadding = 0.3, | |
| x = d3.scale.ordinal() | |
| .rangeRoundBands([0, width], padding, outerPadding); | |
| var y = d3.scale.linear() | |
| .range([height, 0]); | |
| var xAxis = d3.svg.axis() | |
| .scale(x) | |
| .orient("bottom"); | |
| var yAxis = d3.svg.axis() | |
| .scale(y) | |
| .orient("left") | |
| .ticks(8, "%"); | |
| 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.tsv("data.tsv", type, function (error, data) { | |
| var a = alpha(data, v), //scale factor between value and bar width | |
| mid = Midi(data, v, a), //mid-point displacement of bar i | |
| w = Wi(data, v, a); //width of bar i | |
| x.range(data.map(mid)); //force irregular intervals based on value | |
| x.domain(data.map(function (d) { | |
| return d.name; | |
| })); | |
| y.domain([0, d3.max(data, v)]); | |
| svg.append("text") | |
| .attr("class", "title") | |
| .attr("x", x(data[0].name)) | |
| .attr("y", -26) | |
| .attr("shape-rendering", "crispEdges") | |
| .text("Why Are We Leaving Facebook?"); | |
| svg.append("g") | |
| .attr("class", "x axis") | |
| .attr("transform", "translate(0," + height + ")") | |
| .call(xAxis) | |
| .selectAll(".tick text") | |
| .call(wrap, function (d, i) { | |
| return w(i); | |
| }); | |
| svg.append("g") | |
| .attr("class", "y axis") | |
| .call(yAxis); | |
| svg.selectAll(".bar") | |
| .data(data) | |
| .enter().append("rect") | |
| .attr("class", "bar") | |
| .attr("x", function (d, i) { | |
| return x(d.name) - a * d.value/2; //center the bar on the tick | |
| }) | |
| //using x.range sets x.rangeBands to zero, compute width as a function of value | |
| .attr("width", x.rangeBand() || function (d) { | |
| return a * d.value; //`a` already accounts for both types of padding | |
| }) | |
| .attr("y", function (d) { | |
| return y(d.value); | |
| }) | |
| .attr("height", function (d) { | |
| return height - y(d.value); | |
| }); | |
| }); | |
| function wrap(text, width) { | |
| text.each(function (d, i) { | |
| var text = d3.select(this), | |
| words = text.html(d).text().split(/\s+/).reverse(), //reset html to clear any tspans added before | |
| word, | |
| line = [], | |
| lineNumber = 0, | |
| lineHeight = 1.1, // ems | |
| y = text.attr("y"), | |
| dy = parseFloat(text.attr("dy")), | |
| tspan = text.text(null).append("tspan").attr("x", 0).attr("y", y).attr("dy", dy + "em"), | |
| //[edit]add dWidth | |
| dWidth = typeof width === "function" ? width(d, i) : width; | |
| while (word = words.pop()) { | |
| line.push(word); | |
| tspan.text(line.join(" ")); | |
| if (tspan.node().getComputedTextLength() > dWidth/*[edit]*/) { | |
| line.pop(); | |
| tspan.text(line.join(" ")); | |
| line = [word]; | |
| tspan = text.append("tspan").attr("x", 0).attr("y", y).attr("dy", ++lineNumber * lineHeight + dy + "em").text(word); | |
| } | |
| } | |
| }); | |
| } | |
| function type(d) { | |
| d.value = +d.value; | |
| return d; | |
| } | |
| function v(d) { | |
| return +d.value; | |
| } | |
| function alpha(values, value) { | |
| var n = values.length, total = d3.sum(values, value); | |
| return (width - (n - 1) * padding * width / n - 2 * outerPadding * width / n) / total | |
| } | |
| function Wi(values, value, alpha) { | |
| return function (i) { | |
| return value(values[i]) * alpha | |
| } | |
| } | |
| function Midi(values, value, alpha) { | |
| var w = Wi(values, value, alpha), n = values.length; | |
| return function (_, i) { | |
| var op = outerPadding * width / n, p = padding * width / n; | |
| return op + d3.sum(values.slice(0, i), value) * alpha + i * p + w(i) / 2; | |
| } | |
| } | |
| </script> | |
| </body> | |
| </html> |
