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me bar chart
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| license: mit |
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| <!DOCTYPE html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.17/d3.js"></script> | |
| <style> | |
| body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; } | |
| </style> | |
| </head> | |
| <body> | |
| <script> | |
| const margin = { | |
| top: 80, | |
| bottom: 50, | |
| right: 20, | |
| left: 50 | |
| } | |
| var width = 500 - margin.left - margin.right; | |
| var height = 500 - margin.top + margin.bottom; | |
| var chartData = [ | |
| { | |
| value: 153, | |
| category: 'Whatsit', | |
| color: 'blue' | |
| }, | |
| { | |
| value: 25, | |
| category: 'Thingy', | |
| color: 'green' | |
| }, | |
| { | |
| value: 76, | |
| category: 'WTFs', | |
| color: 'orange' | |
| }, | |
| { | |
| value: 200, | |
| category: 'Thingamajiggy', | |
| color: 'purple' | |
| }, | |
| { | |
| value: 300, | |
| category: 'Meh', | |
| color: 'turquoise' | |
| } | |
| ] | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width + margin.left + margin.right) | |
| .attr("height", height + margin.top + margin.bottom) | |
| .attr('style', 'background-color: #f5f5f5') | |
| var g = svg.append('g') | |
| .attr('transform', 'translate(' + margin.left + ',' + margin.right + ')') | |
| var maxValue = d3.max(chartData, function(d) { | |
| return d.value | |
| }) | |
| var y_scale = d3.scale.linear() | |
| .domain([0, maxValue]) | |
| .range([height, 0]) | |
| var x_scale = d3.scale.ordinal() | |
| .domain(chartData.map(function(d) { return d.category})) | |
| .rangeRoundBands([0, width], 0.1, 0) | |
| var bars = g.selectAll('rect.bar').data(chartData) | |
| bars.enter().append('rect') | |
| .attr({ | |
| class: 'bar', | |
| x: function(d, i) { | |
| //return i * barWidth | |
| return x_scale(d.category) | |
| }, | |
| y: function(d, i) { | |
| return y_scale(d.value) | |
| }, | |
| height: function(d, i) { | |
| return height - y_scale(d.value) | |
| }, | |
| width: function(d,i) { | |
| return x_scale.rangeBand(d.category) | |
| }, | |
| style: function(d, i) { | |
| return 'fill: ' + d.color | |
| } | |
| }) | |
| bars.exit().remove(); | |
| var yAxis = d3.svg.axis() | |
| .scale(y_scale) | |
| .orient('left') | |
| var xAxis = d3.svg.axis() | |
| .scale(x_scale) | |
| .orient('bottom') | |
| g.append('g') | |
| .attr('class', 'y-axis axis') | |
| .call(yAxis) | |
| g.append('g') | |
| .attr('class', 'x-axis axis') | |
| .attr('transform', 'translate(0, ' + height + ')') | |
| .call(xAxis) | |
| g.append('text') | |
| .text('My first D3 bar chart!') | |
| // todo: 200 should be width/2 | |
| .attr('transform', 'translate(200, ' + (height + 70) + ')') | |
| .attr('style', 'font-size:1.5em; text-anchor: middle') | |
| // var labels = g.selectAll('text.label').data(chartData) | |
| // labels.enter().append('text') | |
| // .attr({ | |
| // class: 'label', | |
| // y: height + 30, | |
| // x: function(d, i) { | |
| // return x_scale(d.category) + x_scale.rangeBand(d.category)/2 | |
| // }, | |
| // width: function(d,i) { | |
| // return x_scale.rangeBand(d.category) | |
| // }, | |
| // style: 'text-anchor: middle' | |
| // }) | |
| // .text(function(d, i) { | |
| // return d.category | |
| // }) | |
| </script> | |
| </body> |
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