Following the D3.js bar chart example, throwing in error bars and a transition just for kicks.
Created
November 27, 2012 15:44
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| .chart { | |
| font: 10px sans-serif; | |
| } | |
| .chart rect { | |
| fill: steelblue; | |
| stroke: white; | |
| } | |
| .chart line { | |
| stroke: black; | |
| } | |
| .chart .rule { | |
| fill: #ccc; | |
| } | |
| .chart .label { | |
| fill: white; | |
| } | |
| </style> | |
| <body> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script> | |
| var data = [4, 8, 15, 16, 23, 42]; | |
| var error = 4; | |
| var x = d3.scale.linear() | |
| .domain([0, d3.max(data) + error]) | |
| .range([0, 420]); | |
| var y = d3.scale.ordinal() | |
| .domain(data) | |
| .rangeBands([0, 120]); | |
| // SVG | |
| var chart = d3.select("body").append("svg") | |
| .attr("class", "chart") | |
| .attr("width", 440) | |
| .attr("height", 140) | |
| .append("g") | |
| .attr("transform", "translate(10,15)"); | |
| // Ticks | |
| chart.selectAll("line.tick") // Lines | |
| .data(x.ticks(10)) | |
| .enter().append("line") | |
| .attr("class", "tick") | |
| .attr("x1", x) | |
| .attr("x2", x) | |
| .attr("y1", 0) | |
| .attr("y2", 120) | |
| .style("stroke", "#ccc"); | |
| chart.selectAll(".rule") // Line text | |
| .data(x.ticks(10)) | |
| .enter().append("text") | |
| .attr("class", "rule") | |
| .attr("x", x) | |
| .attr("y", 0) | |
| .attr("dy", -3) | |
| .attr("text-anchor", "middle") | |
| .text(String); | |
| chart.append("line") // Baseline | |
| .attr("y1", 0) | |
| .attr("y2", 120) | |
| .style("stroke", "#000"); | |
| // Bars | |
| chart.selectAll("rect") // Values | |
| .data(data) | |
| .enter().append("rect") | |
| .attr("y", y) | |
| .attr("height", y.rangeBand()) | |
| .transition() | |
| .duration(1000) | |
| .attr("width", x); | |
| chart.selectAll("polyline.error") // Error bars | |
| .data(data) | |
| .enter().append("polyline") | |
| .attr("class", "error") | |
| .style("stroke", "#CCC") | |
| .attr("points", function(d){ | |
| var x1 = x(d - error) | |
| , x2 = x(d + error) | |
| , ym = y(d) + y.rangeBand() / 2 | |
| , yt = ym + y.rangeBand() * 1/3 | |
| , yb = ym - y.rangeBand() * 1/3 | |
| return "" + x1 + "," + yt + " " | |
| + x1 + "," + yb + " " | |
| + x1 + "," + ym + " " | |
| + x2 + "," + ym + " " | |
| + x2 + "," + yt + " " | |
| + x2 + "," + yb + " " | |
| + x2 + "," + ym + " " | |
| + x1 + "," + ym + " "; | |
| }) | |
| chart.selectAll(".label") // Value Labels | |
| .data(data) | |
| .enter().append("text") | |
| .attr("class", "label") | |
| .attr("x", x) | |
| .attr("y", function(d) {return y(d) + y.rangeBand() / 2; }) | |
| .attr("dx", -3) | |
| .attr("dy", ".35em") | |
| .attr("text-anchor", "end") | |
| .text(String); | |
| </script> |
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