-
-
Save mumrah/1219845 to your computer and use it in GitHub Desktop.
[d3cast] Simple Bar Chart example with d3.js
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.
Learn more about bidirectional Unicode characters
| <!-- 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}, // Align things | |
| {"label":"1991", "value":56}, | |
| {"label":"1992", "value":7}, | |
| {"label":"1993", "value":77}, | |
| {"label":"1994", "value":22}, | |
| {"label":"1995", "value":16}]; // No trailing comma! | |
| //maximum of data you want to use | |
| var data_max = 80; // Aaarrgg noo!! | |
| //number of tickmarks to use | |
| var num_ticks = 5; | |
| //margins | |
| var left_margin = 60; | |
| var right_margin = 60; | |
| var top_margin = 30; | |
| var bottom_margin = 0; | |
| var w = 500; //width | |
| var h = 700; //height | |
| var color = function(id) { return '#00b3dc' }; | |
| // Really hard to read | |
| var x = d3.scale.linear() | |
| .domain([0, data_max]) | |
| .range([0, w - ( left_margin + right_margin ) ]); | |
| var 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); | |
| // Dont go overboard with chaining methods, it gets confusing | |
| vis.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 | |
| // Be consistent with indentation | |
| 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> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment