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| license: mit |
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| <!DOCTYPE html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <style> | |
| body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; | |
| background-color: #ccc | |
| } | |
| .axis { | |
| font: 10px sans-serif; | |
| } | |
| .axis path, | |
| .axis line { | |
| fill: none; | |
| stroke: #000; | |
| shape-rendering: crispEdges; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <script> | |
| var data =[[2011,0.11],[2012,0.44],[2013,-0.34],[2014,.24]] | |
| // var width = 200 | |
| // var height = 200 | |
| var margin = {top: 20, right: 20, bottom: 64, left: 40} | |
| var width = 313 - margin.left - margin.right | |
| var height = 217 - margin.top - margin.bottom | |
| var bar = {height: 10} | |
| 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 + ")"); | |
| var x = d3.scaleBand().rangeRound([0, width], .05).padding(0.4); | |
| var y = d3.scaleLinear().range([height, 0]); | |
| data.forEach(function(d) { | |
| d.date = d3.timeParse("%Y")(d[0]); | |
| d.value = +d[1]; | |
| }); | |
| x.domain(data.map(function(d) { return d.date; })); | |
| y.domain(d3.extent(data.map(function(d) { return d.value; }))) | |
| var xAxis = d3.axisBottom() | |
| .scale(x) | |
| .tickFormat(d3.timeFormat("%Y")) | |
| var yAxis = d3.axisLeft() | |
| .scale(y) | |
| .ticks(4); | |
| svg.append("g") | |
| .attr("class", "x axis") | |
| .attr("transform", "translate(0," + height + ")") | |
| .call(xAxis) | |
| svg.append("g") | |
| .attr("class", "y axis") | |
| .call(yAxis) | |
| svg.append("line") | |
| .attr("y1",y(0)) | |
| .attr("y2",y(0)) | |
| .attr("x2",width) | |
| .style("stroke","grey") | |
| .style("stroke-width","0.5") | |
| var bh = 4; | |
| svg.selectAll("bar") | |
| .data(data) | |
| .enter() | |
| .each(function (d, i) { | |
| var g = d3.select(this) | |
| .append("g") | |
| .attr("class", function(d) { return "bar bar-" + (d.value < 0 ? "negative" : "positive"); }) | |
| var h = Math.abs(y(d.value) - y(0)) | |
| d3.range(0,Math.floor(h/bh/2)).forEach((p,j)=>{ | |
| // console.log(d.value) | |
| if (d.value > 0) { | |
| j=(j*-1)-0.5 | |
| g.append("rect") | |
| .style("fill", "steelblue") | |
| .attr("x", x(d.date)) | |
| .attr("width", x.bandwidth()) | |
| .attr("y", y(0) + j*bh*2 ) | |
| .attr("height", bh); | |
| } else if (d.value < 0) { | |
| g.append("rect") | |
| .style("fill", "steelblue") | |
| .attr("x", x(d.date)) | |
| .attr("width", x.bandwidth()) | |
| .attr("y", y(Math.max(0, d.value)) + j*bh*2 ) | |
| .attr("height", bh); } | |
| }) | |
| }) | |
| </script> | |
| </body> |
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