This is a simple labelled bar chart using conventional margins, partly inspired by Mike Bostock's vertical example.
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November 3, 2023 15:31
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Simple horizontal bar chart
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset='utf-8' /> | |
| <title>Simple Bar chart</title> | |
| <script src="https://d3js.org/d3.v3.min.js" charset="utf-8"></script> | |
| <style> | |
| body { | |
| font-family: "Arial", sans-serif; | |
| } | |
| .bar { | |
| fill: #5f89ad; | |
| } | |
| .axis { | |
| font-size: 13px; | |
| } | |
| .axis path, | |
| .axis line { | |
| fill: none; | |
| display: none; | |
| } | |
| .label { | |
| font-size: 13px; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div id="graphic"></div> | |
| <script> | |
| var data = [{ | |
| "name": "Apples", | |
| "value": 20, | |
| }, | |
| { | |
| "name": "Bananas", | |
| "value": 12, | |
| }, | |
| { | |
| "name": "Grapes", | |
| "value": 19, | |
| }, | |
| { | |
| "name": "Lemons", | |
| "value": 5, | |
| }, | |
| { | |
| "name": "Limes", | |
| "value": 16, | |
| }, | |
| { | |
| "name": "Oranges", | |
| "value": 26, | |
| }, | |
| { | |
| "name": "Pears", | |
| "value": 30, | |
| }]; | |
| //sort bars based on value | |
| data = data.sort(function (a, b) { | |
| return d3.ascending(a.value, b.value); | |
| }) | |
| //set up svg using margin conventions - we'll need plenty of room on the left for labels | |
| var margin = { | |
| top: 15, | |
| right: 25, | |
| bottom: 15, | |
| left: 60 | |
| }; | |
| var width = 960 - margin.left - margin.right, | |
| height = 500 - margin.top - margin.bottom; | |
| var svg = d3.select("#graphic").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 x = d3.scale.linear() | |
| .range([0, width]) | |
| .domain([0, d3.max(data, function (d) { | |
| return d.value; | |
| })]); | |
| var y = d3.scale.ordinal() | |
| .rangeRoundBands([height, 0], .1) | |
| .domain(data.map(function (d) { | |
| return d.name; | |
| })); | |
| //make y axis to show bar names | |
| var yAxis = d3.svg.axis() | |
| .scale(y) | |
| //no tick marks | |
| .tickSize(0) | |
| .orient("left"); | |
| var gy = svg.append("g") | |
| .attr("class", "y axis") | |
| .call(yAxis) | |
| var bars = svg.selectAll(".bar") | |
| .data(data) | |
| .enter() | |
| .append("g") | |
| //append rects | |
| bars.append("rect") | |
| .attr("class", "bar") | |
| .attr("y", function (d) { | |
| return y(d.name); | |
| }) | |
| .attr("height", y.rangeBand()) | |
| .attr("x", 0) | |
| .attr("width", function (d) { | |
| return x(d.value); | |
| }); | |
| //add a value label to the right of each bar | |
| bars.append("text") | |
| .attr("class", "label") | |
| //y position of the label is halfway down the bar | |
| .attr("y", function (d) { | |
| return y(d.name) + y.rangeBand() / 2 + 4; | |
| }) | |
| //x position is 3 pixels to the right of the bar | |
| .attr("x", function (d) { | |
| return x(d.value) + 3; | |
| }) | |
| .text(function (d) { | |
| return d.value; | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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