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POHow to fix shifted columns on histogram?
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  1. POHow to fix shifted columns on histogram?
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    copied!<p>I am building a histogram with number of days as the x axis, but the columns are shifted. I want to bin the data on months, or more exactly, 30-day intervals. For some reason, when generating this graph the columns are not the right size, and the bars end up shifting a lot, as shown in the picture:</p> <p><img src="https://i.stack.imgur.com/ERsFc.png" alt="Histogram output"></p> <p>The bins are hardcoded like this:</p> <pre><code> var data = d3.layout.histogram() .bins(20) (values); var y = d3.scale.linear() .domain([0, d3.max(data, function(d) { return d.y; })]) .range([height, 0]); var xAxis = d3.svg.axis() .scale(x) .tickValues([0,30,60,90,120,150,180,210,240,270,300,330,360,390,420,450,480,510,540,570,600]) .orient("bottom"); var svg = d3.select("#graph").append("svg") .attr("width", width + margin.left + margin.right) .attr("height", height + margin.top + margin.bottom) .append("g") .attr("transform", "translate(" + margin.left + "," + margin.top + ")"); var bar = svg.selectAll(".bar") .data(data) .enter().append("g") .attr("class", "bar") .attr("transform", function(d) { return "translate(" + x(d.x) + "," + y(d.y) + ")"; }); bar.append("rect") .attr("x", 1) .attr("width", x(data[0].dx) - 1) .attr("height", function(d) { return height - y(d.y); }); bar.append("text") .attr("dy", ".75em") .attr("y", 6) .attr("x", x(data[0].dx) / 2) .attr("text-anchor", "middle") .text(function(d) { return formatCount(d.y); }); svg.append("g") .attr("class", "x axis") .attr("transform", "translate(0," + height + ")") .call(xAxis); </code></pre> <p>What is the correct way to solve this issue?</p>
 

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