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bar chart
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| license: mit |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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| <!DOCTYPE html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.17/d3.min.js"></script> | |
| <style> | |
| body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; } | |
| </style> | |
| </head> | |
| <body> | |
| <script> | |
| // Feel free to change or delete any of the code you see in this editor! | |
| var canvasWidth = 700 | |
| var canvasHeight = 500 | |
| var margins = { top: 10, bottom: 30, left: 30, right: 20 } | |
| var translate = "translate(" + margins.left +", " + margins.top + ")" | |
| // grab the svg tag | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", canvasWidth) | |
| .attr("height", canvasHeight) | |
| .style("background-color", "lightgrey") | |
| var data = [{ x: 'A', y: 20, color: '#334499' }, | |
| { x: 'B', y: 40, color: '#994455' }, | |
| { x: 'C', y: 10, color: '#339999' }, | |
| { x: 'D', y: 50, color: '#444499' }, | |
| { x: 'E', y: 30, color: '#994455' } | |
| ]; | |
| canvasHeight -= (margins.top + margins.bottom) | |
| canvasWidth -= (margins.left + margins.right) | |
| // use "group" to move bars into margins | |
| var g = svg.append('g').attr("transform", translate) | |
| var maxY = d3.max(data, function(d,i) {return d.y }) | |
| var y_scale = d3.scale.linear() | |
| .domain([0, maxY]) | |
| .range([canvasHeight, 0]); | |
| var x_scale = d3.scale.ordinal() | |
| .domain(data.map(function(d) { return d.x } )) | |
| .rangeRoundBands([0, canvasWidth], 0.1, 0.4) | |
| // create "bars" | |
| var bars = g.selectAll('rect').data(data) | |
| bars.enter().append('rect') | |
| bars.attr({ x: function (d,i) { return x_scale(d.x) }, | |
| y: function (d,i) { return y_scale(d.y) }, | |
| width: x_scale.rangeBand(), | |
| height: function (d,i) { return canvasHeight - y_scale(d.y) } | |
| }) | |
| bars.style('fill', function (d,i) { return 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") | |
| .call(yAxis) | |
| var axisTranslate = "translate(0, " + canvasHeight + ")" | |
| g.append("g") | |
| .attr("class", "x axis") | |
| .attr("transform", axisTranslate) | |
| .call(xAxis) | |
| </script> | |
| </body> |
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