The simplest example of an axes where the x axis if for a date range.
See it running at http://bl.ocks.org/3059392
Tips on tidying up the look, formatting labels etc here: http://alignedleft.com/tutorials/d3/axes/
This presentation also has good example of simple axes http://lws.node3.org/#landing-slide
Understanding scales - http://www.jeromecukier.net/blog/2011/08/11/d3-scales-and-color/
Fuller example here: https://gist.github.com/3061203
| <html> | |
| <head> | |
| <title>D3 Axis Example</title> | |
| <script src="http://d3js.org/d3.v2.js"></script> | |
| </head> | |
| <body> | |
| <script> | |
| var width = 700, | |
| height = 400, | |
| padding = 100; | |
| // create an svg container | |
| var vis = d3.select("body"). | |
| append("svg:svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| // define the y scale (vertical) | |
| var yScale = d3.scale.linear() | |
| .domain([0, 100]) // values between 0 and 100 | |
| .range([height - padding, padding]); // map these to the chart height, less padding. | |
| //REMEMBER: y axis range has the bigger number first because the y value of zero is at the top of chart and increases as you go down. | |
| // define the x scale (horizontal) | |
| var mindate = new Date(2012,0,1), | |
| maxdate = new Date(2012,0,31); | |
| var xScale = d3.time.scale() | |
| .domain([mindate, maxdate]) // values between for month of january | |
| .range([padding, width - padding * 2]); // map these the the chart width = total width minus padding at both sides | |
| // define the y axis | |
| var yAxis = d3.svg.axis() | |
| .orient("left") | |
| .scale(yScale); | |
| // define the y axis | |
| var xAxis = d3.svg.axis() | |
| .orient("bottom") | |
| .scale(xScale); | |
| // draw y axis with labels and move in from the size by the amount of padding | |
| vis.append("g") | |
| .attr("transform", "translate("+padding+",0)") | |
| .call(yAxis); | |
| // draw x axis with labels and move to the bottom of the chart area | |
| vis.append("g") | |
| .attr("class", "xaxis") // give it a class so it can be used to select only xaxis labels below | |
| .attr("transform", "translate(0," + (height - padding) + ")") | |
| .call(xAxis); | |
| // now rotate text on x axis | |
| // solution based on idea here: https://groups.google.com/forum/?fromgroups#!topic/d3-js/heOBPQF3sAY | |
| // first move the text left so no longer centered on the tick | |
| // then rotate up to get 45 degrees. | |
| vis.selectAll(".xaxis text") // select all the text elements for the xaxis | |
| .attr("transform", function(d) { | |
| return "translate(" + this.getBBox().height*-2 + "," + this.getBBox().height + ")rotate(-45)"; | |
| }); | |
| </script> | |
| </body> | |
| </html> |