Created
September 15, 2011 04:47
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[d3cast] Simple Bar Chart example with d3.js
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| <!-- Annotated javascript available at http://enja.org/code/tuts/d3/bar --> | |
| <!-- Code walkthrough screencast available at --> | |
| <html> | |
| <head> | |
| <title>Enjalot's Bar</title> | |
| <script type="text/javascript" src="http://mbostock.github.com/d3/d3.js?2.1.3"></script> | |
| <script type="text/javascript" src="http://mbostock.github.com/d3/d3.geom.js?2.1.3"></script> | |
| <script type="text/javascript" src="http://mbostock.github.com/d3/d3.layout.js?2.1.3"></script> | |
| <style type="text/css"> | |
| .bar rect | |
| { | |
| /* | |
| fill: black; | |
| stroke: black; | |
| */ | |
| } | |
| .label | |
| { | |
| font-family: Verdana; | |
| font-size: 15pt; | |
| color: gray; | |
| fill-opacity: .6; | |
| } | |
| .value | |
| { | |
| font-family: Verdana; | |
| font-size: 11pt; | |
| color: gray; | |
| fill-opacity: .6; | |
| } | |
| .tick_label | |
| { | |
| font-size: 15pt; | |
| font-family: Verdana; | |
| color: gray; | |
| fill-opacity: .6; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <script type="text/javascript"> | |
| var data = [{"label":"1990", "value":16}, | |
| {"label":"1991", "value":56}, | |
| {"label":"1992", "value":7}, | |
| {"label":"1993", "value":77}, | |
| {"label":"1994", "value":22}, | |
| {"label":"1995", "value":16}, | |
| ]; | |
| //maximum of data you want to use | |
| var data_max = 80, | |
| //number of tickmarks to use | |
| num_ticks = 5, | |
| //margins | |
| left_margin = 60, | |
| right_margin = 60, | |
| top_margin = 30, | |
| bottom_margin = 0; | |
| var w = 500, //width | |
| h = 500, //height | |
| color = function(id) { return '#00b3dc' }; | |
| var x = d3.scale.linear() | |
| .domain([0, data_max]) | |
| .range([0, w - ( left_margin + right_margin ) ]), | |
| y = d3.scale.ordinal() | |
| .domain(d3.range(data.length)) | |
| .rangeBands([bottom_margin, h - top_margin], .5); | |
| var chart_top = h - y.rangeBand()/2 - top_margin; | |
| var chart_bottom = bottom_margin + y.rangeBand()/2; | |
| var chart_left = left_margin; | |
| var chart_right = w - right_margin; | |
| /* | |
| * Setup the SVG element and position it | |
| */ | |
| var vis = d3.select("body") | |
| .append("svg:svg") | |
| .attr("width", w) | |
| .attr("height", h) | |
| .append("svg:g") | |
| .attr("id", "barchart") | |
| .attr("class", "barchart") | |
| //Ticks | |
| var rules = vis.selectAll("g.rule") | |
| .data(x.ticks(num_ticks)) | |
| .enter() | |
| .append("svg:g") | |
| .attr("transform", function(d) | |
| { | |
| return "translate(" + (chart_left + x(d)) + ")";}); | |
| rules.append("svg:line") | |
| .attr("class", "tick") | |
| .attr("y1", chart_top) | |
| .attr("y2", chart_top + 4) | |
| .attr("stroke", "black"); | |
| rules.append("svg:text") | |
| .attr("class", "tick_label") | |
| .attr("text-anchor", "middle") | |
| .attr("y", chart_top) | |
| .text(function(d) | |
| { | |
| return d; | |
| }); | |
| var bbox = vis.selectAll(".tick_label").node().getBBox(); | |
| vis.selectAll(".tick_label") | |
| .attr("transform", function(d) | |
| { | |
| return "translate(0," + (bbox.height) + ")"; | |
| }); | |
| var bars = vis.selectAll("g.bar") | |
| .data(data) | |
| .enter() | |
| .append("svg:g") | |
| .attr("class", "bar") | |
| .attr("transform", function(d, i) { | |
| return "translate(0, " + y(i) + ")"; }); | |
| bars.append("svg:rect") | |
| .attr("x", right_margin) | |
| .attr("width", function(d) { | |
| return (x(d.value)); | |
| }) | |
| .attr("height", y.rangeBand()) | |
| .attr("fill", color(0)) | |
| .attr("stroke", color(0)); | |
| //Labels | |
| var labels = vis.selectAll("g.bar") | |
| .append("svg:text") | |
| .attr("class", "label") | |
| .attr("x", 0) | |
| .attr("text-anchor", "right") | |
| .text(function(d) { | |
| return d.label; | |
| }); | |
| var bbox = labels.node().getBBox(); | |
| vis.selectAll(".label") | |
| .attr("transform", function(d) { | |
| return "translate(0, " + (y.rangeBand()/2 + bbox.height/4) + ")"; | |
| }); | |
| labels = vis.selectAll("g.bar") | |
| .append("svg:text") | |
| .attr("class", "value") | |
| .attr("x", function(d) | |
| { | |
| return x(d.value) + right_margin + 10; | |
| }) | |
| .attr("text-anchor", "left") | |
| .text(function(d) | |
| { | |
| return "" + d.value + "%"; | |
| }); | |
| bbox = labels.node().getBBox(); | |
| vis.selectAll(".value") | |
| .attr("transform", function(d) | |
| { | |
| return "translate(0, " + (y.rangeBand()/2 + bbox.height/4) + ")"; | |
| }); | |
| //Axes | |
| vis.append("svg:line") | |
| .attr("class", "axes") | |
| .attr("x1", chart_left) | |
| .attr("x2", chart_left) | |
| .attr("y1", chart_bottom) | |
| .attr("y2", chart_top) | |
| .attr("stroke", "black"); | |
| vis.append("svg:line") | |
| .attr("class", "axes") | |
| .attr("x1", chart_left) | |
| .attr("x2", chart_right) | |
| .attr("y1", chart_top) | |
| .attr("y2", chart_top) | |
| .attr("stroke", "black"); | |
| </script> | |
| </body> | |
| </html> |
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