D3.js not displaying chart
d3.js, javascript, php
Solution
Well, this one's going to be a face-palm moment.
The only thing wrong was a typo.
<sgv class="day_chart"></svg>
Should of course be
<svg class="day_chart"></svg>
I've got a working version here http://jsfiddle.net/cZxey/11/
(I also set the library to load D3, and inserted hard-coded data. For working with the real data, just comment that out. Oh, and increase your bottom padding so your tick mark labels don't get cut off.)
--ABR
Problem
I am using D3 for the first time and I have followed the instructions on their site to get to this point. I cannot seem to get the chart to display although there are no exceptions in the JS console in Chrome. Here's the JS in the header of my page: ``` <script> var margin = { top: 0, right: 0, bottom: 10, left: 0 }, width = 838 - margin.left - margin.right, height = 300 - margin.top - margin.bottom; var x = d3.scale.ordinal() .rangeRoundBands([0, width], .1); var y = d3.scale.linear() .range([height, 0]); var xAxis = d3.svg.axis() .scale(x) .orient("bottom"); var yAxis = d3.svg.axis() .scale(y) .orient("left"); var chart = d3.select(".day_chart") .attr("width", width + margin.left + margin.right) .attr("height", height + margin.top + margin.bottom) .append("g") .attr("transform", "translate(" + margin.left + "," + margin.top + ")"); d3.json("http://solarmonitoringaustralia.com.au/myphp/inverterdata.php?var=TEST1&id=C120031", function (error, data) { data.forEach(function (d) { d.hour = +d.hour; // coerce to number d.max_energy = +d.max_energy; alert(d.hour + " -- " + d.max_energy); }); x.domain(data.map(function (d) { return d.hour; })); y.domain([0, d3.max(data, function (d) { return d.max_energy; })]); chart.append("g") .attr("class", "x axis") .attr("transform", "translate(0," + height + ")") .call(xAxis); chart.append("g") .attr("class", "y axis") .call(yAxis); chart.selectAll(".bar") .data(data) .enter().append("rect") .attr("class", "bar") .attr("x", function (d) { return x(d.hour); }) .attr("y", function (d) { return y(d.max_energy); }) .attr("height", function (d) { return height - y(d.max_energy); }) .attr("width", x.rangeBand()); }); </script> ``` The code calls in a JSON request to a server side script. Here's the data it returns to the browser when executing the query: ``` [{"hour":"1","max_energy":"15.969"},{"hour":"2","max_energy":"19.065"},{"hour":"3","max_energy":"21.191"},{"hour":"4","max_energy":"23.151"},{"hour":"5","max_energy":"24.403"},{"hour":"6","max_energy":"25.082"},{"hour":"7","max_energy":"25.494"},{"hour":"8","max_energy":"25.499"},{"hour":"9","max_energy":"4.685"},{"hour":"10","max_energy":"7.309"},{"hour":"11","max_energy":"10.051"},{"hour":"12","max_energy":"13.119"}] ``` My HTML contains this tag where I want the chart to appear: ``` <sgv class="day_chart"></svg> ``` I can see the data passing into the JS above via the "alert" function in the data.forEach(function (d), so the data comes back. The page loads but it loads with a blank area where the chart would go, and no JS errors in the console. Thanks for any advice!