This example demonstrates D3's new d3.svg.axis component, which makes it easy to add reference lines and labels to a custom visualization. The axis component even supports automatic transitions! Click on the area to change the scale and watch as new ticks smoothly replace the old ones. Built with D3.js.
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Axis Component
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <script type="text/javascript" src="http://mbostock.github.com/d3/d3.js?2.0.0"></script> | |
| <script type="text/javascript" src="http://mbostock.github.com/d3/d3.csv.js?2.0.0"></script> | |
| <script type="text/javascript" src="http://mbostock.github.com/d3/d3.time.js?2.0.0"></script> | |
| <style type="text/css"> | |
| body { | |
| font: 10px sans-serif; | |
| margin: 0; | |
| } | |
| path.line { | |
| fill: none; | |
| stroke: #666; | |
| stroke-width: 1.5px; | |
| } | |
| path.area { | |
| fill: #e7e7e7; | |
| } | |
| .axis { | |
| shape-rendering: crispEdges; | |
| } | |
| .x.axis line { | |
| stroke: #fff; | |
| } | |
| .x.axis .minor { | |
| stroke-opacity: .5; | |
| } | |
| .x.axis path { | |
| display: none; | |
| } | |
| .y.axis line, .y.axis path { | |
| fill: none; | |
| stroke: #000; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <script type="text/javascript"> | |
| var m = [80, 80, 80, 80], | |
| w = 960 - m[1] - m[3], | |
| h = 500 - m[0] - m[2], | |
| parse = d3.time.format("date%Y-%m-%d").parse; | |
| // Scales and axes. Note the inverted domain for the y-scale: bigger is up! | |
| var x = d3.time.scale().range([0, w]), | |
| y = d3.scale.linear().range([h, 0]), | |
| xAxis = d3.svg.axis().scale(x).tickSize(-h).tickSubdivide(true), | |
| yAxis = d3.svg.axis().scale(y).ticks(4).orient("right"); | |
| // An area generator, for the light fill. | |
| var area = d3.svg.area() | |
| .interpolate("monotone") | |
| .x(function(d) { return x(d.date); }) | |
| .y0(h) | |
| .y1(function(d) { return y(d.price); }); | |
| // A line generator, for the dark stroke. | |
| var line = d3.svg.line() | |
| .interpolate("monotone") | |
| .x(function(d) { return x(d.date); }) | |
| .y(function(d) { return y(d.price); }); | |
| d3.json("tweets.json", function(data) { | |
| console.log data["followersperdate"] | |
| followers = data["followersperdate"] | |
| values = [] | |
| // Parse dates and numbers. We assume values are sorted by date. | |
| followers.entries.forEach(function(item) { | |
| console.log(item); | |
| }); | |
| // // Compute the minimum and maximum date, and the maximum price. | |
| // x.domain([values[0].date, values[values.length - 1].date]); | |
| // y.domain([0, d3.max(values, function(d) { return d.price; })]).nice(); | |
| // // Add an SVG element with the desired dimensions and margin. | |
| // var svg = d3.select("body").append("svg:svg") | |
| // .attr("width", w + m[1] + m[3]) | |
| // .attr("height", h + m[0] + m[2]) | |
| // .append("svg:g") | |
| // .attr("transform", "translate(" + m[3] + "," + m[0] + ")"); | |
| // // Add the clip path. | |
| // svg.append("svg:clipPath") | |
| // .attr("id", "clip") | |
| // .append("svg:rect") | |
| // .attr("width", w) | |
| // .attr("height", h); | |
| // // Add the area path. | |
| // svg.append("svg:path") | |
| // .attr("class", "area") | |
| // .attr("clip-path", "url(#clip)") | |
| // .attr("d", area(values)); | |
| // // Add the x-axis. | |
| // svg.append("svg:g") | |
| // .attr("class", "x axis") | |
| // .attr("transform", "translate(0," + h + ")") | |
| // .call(xAxis); | |
| // // Add the y-axis. | |
| // svg.append("svg:g") | |
| // .attr("class", "y axis") | |
| // .attr("transform", "translate(" + w + ",0)") | |
| // .call(yAxis); | |
| // // Add the line path. | |
| // svg.append("svg:path") | |
| // .attr("class", "line") | |
| // .attr("clip-path", "url(#clip)") | |
| // .attr("d", line(values)); | |
| // // Add a small label for the symbol name. | |
| // svg.append("svg:text") | |
| // .attr("x", w - 6) | |
| // .attr("y", h - 6) | |
| // .attr("text-anchor", "end") | |
| // .text(values[0].symbol); | |
| // // On click, update the x-axis. | |
| // svg.on("click", function() { | |
| // var n = values.length - 1, | |
| // i = Math.floor(Math.random() * n / 2), | |
| // j = i + Math.floor(Math.random() * n / 2) + 1; | |
| // x.domain([values[i].date, values[j].date]); | |
| // var t = svg.transition().duration(750); | |
| // t.select(".x.axis").call(xAxis); | |
| // t.select(".area").attr("d", area(values)); | |
| // t.select(".line").attr("d", line(values)); | |
| // }); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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| { | |
| "followersperdate":{ | |
| "date2012-05-23":13430, | |
| "date2012-05-22":13418, | |
| "date2012-05-21":13417, | |
| "date2012-05-20":13412, | |
| "date2012-05-19":13401, | |
| "date2012-05-18":13400, | |
| "date2012-05-17":13400, | |
| "date2012-05-16":13390, | |
| "date2012-05-15":13378, | |
| "date2012-05-14":13383, | |
| "date2012-05-13":13369, | |
| "date2012-05-12":13360, | |
| "date2012-05-11":13360, | |
| "date2012-05-10":13356 | |
| }, | |
| } |
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