A re-implementation of Mike Bostock's classic "Let's Make a Bar Chart" example, using d3fc. This example highlights the power of the decorate pattern, with the bar colour changed on decorate, and value labels added.
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Let's build a bar chart - d3fc version
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| license: mit |
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| letter | frequency | |
|---|---|---|
| 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> | |
| <!-- include polyfills for custom event, Symbol and Custom Elements --> | |
| <script src="//unpkg.com/babel-polyfill@6.26.0/dist/polyfill.js"></script> | |
| <script src="//unpkg.com/custom-event-polyfill@0.3.0/custom-event-polyfill.js"></script> | |
| <script src="//cdnjs.cloudflare.com/ajax/libs/document-register-element/1.8.0/document-register-element.js"></script> | |
| <!-- use babel so that we can use arrow functions and other goodness in this block! --> | |
| <script src="//unpkg.com/babel-standalone@6/babel.min.js"></script> | |
| <script src="//unpkg.com/d3@5.5.0"></script> | |
| <script src="//unpkg.com/d3fc@14.0.41"></script> | |
| <style> | |
| #chart { | |
| width: 100%; | |
| height: 500px; | |
| } | |
| .x-axis .domain { | |
| display: none; | |
| } | |
| .bar-label { | |
| text-anchor: middle; | |
| font-size: 12px; | |
| fill: black; | |
| } | |
| </style> | |
| <div id="chart"></div> | |
| <script type='text/babel'> | |
| const isVowel = (letter) => 'AEIOU'.indexOf(letter) !== -1; | |
| var barSeries = fc.autoBandwidth(fc.seriesSvgBar()) | |
| .crossValue(d => d.letter) | |
| .align('left') | |
| .mainValue(d => d.frequency) | |
| .decorate((selection) => { | |
| selection.select('path') | |
| .style('fill', d => isVowel(d.letter) ? 'indianred' : 'steelblue'); | |
| selection.enter() | |
| .append('text') | |
| .attr('class', 'bar-label') | |
| .attr('transform', 'translate(0, -5)') | |
| .text(d => d3.format('.1%')(d.frequency)); | |
| }); | |
| d3.tsv("data.tsv", d => { | |
| d.frequency = +d.frequency; | |
| return d; | |
| }).then(data => { | |
| var yExtent = fc.extentLinear() | |
| .accessors([d => d.frequency]) | |
| .pad([0, 0.1]) | |
| .include([0]); | |
| var chart = fc.chartCartesian( | |
| d3.scaleBand(), | |
| d3.scaleLinear() | |
| ) | |
| .xDomain(data.map(d => d.letter)) | |
| .xPadding(0.2) | |
| .yDomain(yExtent(data)) | |
| .yTicks(10, '%') | |
| .yOrient('left') | |
| .svgPlotArea(barSeries); | |
| d3.select('#chart') | |
| .datum(data) | |
| .call(chart); | |
| }); | |
| </script> |
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