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D3JS Bar Graph (Above and Below x-axis with animation)
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| window.onload=function(){ | |
| var data = [-15, 20, -22, 18, -2, 6, -26, 18], | |
| duration = 300; | |
| var margin = {top: 30, right: 10, bottom: 10, left: 30}, | |
| width = 320 - margin.left - margin.right, | |
| height = 250 - margin.top - margin.bottom; | |
| var y0 = Math.max(Math.abs(d3.min(data)), Math.abs(d3.max(data))); | |
| var y = d3.scale.linear() | |
| .domain([-y0, y0]) | |
| .range([height,0]) | |
| .nice(); | |
| var x = d3.scale.ordinal() | |
| .domain(d3.range(data.length * 2)) | |
| .rangeRoundBands([0, width], .1); | |
| var yAxis = d3.svg.axis() | |
| .scale(y) | |
| .orient("left"); | |
| 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 + ")"); | |
| svg.selectAll("rect") | |
| .data(data) | |
| .enter().append("rect") | |
| .attr("class", function(d) { return d < 0 ? "bar negative" : "bar positive"; }) | |
| .attr("y", function(d) { return y(0); }) | |
| .attr("x", function(d, i) { | |
| if (d < 0) { return x(i)/2; } | |
| else { return x(i-1)/2; } | |
| }) | |
| .attr("width", x.rangeBand()) | |
| .attr("height", 0) | |
| .transition().delay(function (d,i){ | |
| if (d < 0) { return i * duration + data.length * duration; } | |
| else {return i * duration;} | |
| }) | |
| .duration(duration) | |
| .attr("height", function(d) { return Math.abs(y(d) - y(0)); }) | |
| .attr("y", function(d) { return y(Math.max(0, d)); }); | |
| svg.append("g") | |
| .attr("class", "y axis") | |
| .call(yAxis); | |
| svg.append("g") | |
| .attr("class", "x axis") | |
| .append("line") | |
| .attr("y1", y(0)) | |
| .attr("y2", y(0)) | |
| .attr("x1", 0) | |
| .attr("x2", width); | |
| } |
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| <html><head> | |
| <meta http-equiv="content-type" content="text/html; charset=UTF-8"> | |
| <script type="text/javascript" src="http://d3js.org/d3.v3.min.js"></script> | |
| <script type="text/javascript" src="dualbar.js"></script> | |
| <style type="text/css"> | |
| .bar.positive { | |
| fill: steelblue; | |
| } | |
| .bar.negative { | |
| fill: brown; | |
| } | |
| .axis text { | |
| font: 10px sans-serif; | |
| } | |
| .axis path, | |
| .axis line { | |
| fill: none; | |
| stroke: #000; | |
| shape-rendering: crispEdges; | |
| } | |
| </style> | |
| </head> | |
| <body></body> |
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