- padding is done by barWidth - 1
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August 1, 2016 03:23
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2. vertical barChart
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| license: gpl-3.0 |
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| name | value | |
|---|---|---|
| A | .08167 | |
| B | .01492 | |
| C | .02782 | |
| D | .04253 | |
| E | .12702 | |
| F | .02288 | |
| G | .02015 | |
| H | .06094 | |
| I | .06966 | |
| J | .00153 | |
| K | .00772 | |
| L | .04025 | |
| M | .02406 | |
| N | .06749 | |
| O | .07507 | |
| P | .01929 | |
| Q | .00095 | |
| R | .05987 | |
| S | .06327 | |
| T | .09056 | |
| U | .02758 | |
| V | .00978 | |
| W | .02360 | |
| X | .00150 | |
| Y | .01974 | |
| Z | .00074 |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| .chart rect { | |
| fill: orange; | |
| } | |
| .chart text { | |
| fill: steelblue; | |
| font: 10px sans-serif; | |
| text-anchor: middle; | |
| } | |
| </style> | |
| <svg class="chart"></svg> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <script> | |
| var width = 960, | |
| height = 500; | |
| var chart = d3.select(".chart") | |
| .attr("width", width) | |
| .attr("height", height); | |
| var yScale = d3.scaleLinear() | |
| // set px-range: from bottom to top => [height, 0] | |
| .range([height, 0]); | |
| function type(d) { | |
| // coerce into numeric values from string | |
| // round decimal using Math.round*100/100 | |
| d.value = Math.round(+d.value*100)/100; | |
| return d; | |
| } | |
| d3.tsv("data.tsv", type, function(error, data) { | |
| yScale.domain([0, d3.max(data, function(d) { return d.value; })]); | |
| // set barWidth using SVG's width / data.length | |
| var barWidth = width / data.length; | |
| var bar = chart.selectAll("g") | |
| .data(data) | |
| .enter() | |
| .append("g") | |
| .attr("transform", function(d, i) { return "translate(" + i * barWidth + ",0)"; }); | |
| bar.append("rect") | |
| // rect's y coord default is 0 inherited from g | |
| // set each rect's topLeft corner's "y" coord | |
| .attr("y", function(d) { return yScale(d.value); }) | |
| // set each rect's height using canvas height and y coord | |
| .attr("height", function(d) { return height - yScale(d.value); }) | |
| .attr("width", barWidth - 1); | |
| // step 7 | |
| bar.append("text") | |
| // set each text's x coord | |
| .attr("x", barWidth / 2) | |
| // set each text's y coord | |
| .attr("y", function(d) { return yScale(d.value) + 3; }) | |
| .attr("dy", ".75em") | |
| .text(function(d) { return d.value; }); | |
| // attr text-anchor is set to middle | |
| }); | |
| </script> |
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