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bar chart
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| license: mit |
This file contains hidden or 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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