<!DOCTYPE html> <meta charset="utf-8"> <style> .bar{ fill: steelblue; } .bar:hover{ fill: brown; } .axis { font: 10px sans-serif; } .axis path, .axis line { fill: none; stroke: #000; shape-rendering: crispEdges; } </style> <body> <script src="https://d3js.org/d3.v4.min.js"></script> <script> data = [ { "Letter": "A", "Freq": 20}, { "Letter" : "B", "Freq": 12}, { "Letter" : "C", "Freq": 47}, { "Letter" : "D", "Freq": 34}, { "Letter" : "E", "Freq" : 54}, { "Letter" : "F", "Freq" : 21}, { "Letter" : "G", "Freq" : 57}, { "Letter" : "H", "Freq" : 31}, { "Letter" : "I", "Freq" : 17}, { "Letter" : "J", "Freq" : 5}, { "Letter" : "K", "Freq" : 23}, { "Letter" : "L", "Freq" : 39}, { "Letter" : "M", "Freq" : 29}, { "Letter" : "N", "Freq" : 33}, { "Letter" : "O", "Freq" : 18} ] // set the dimensions of the canvas var margin = {top: 20, right: 20, bottom: 70, left: 40}, width = 600 - margin.left - margin.right, height = 300 - margin.top - margin.bottom; // set the ranges var x = d3.scale.ordinal().rangeRoundBands([0, width], .05); var y = d3.scale.linear().range([height, 0]); // define the axis var xAxis = d3.svg.axis() .scale(x) .orient("bottom") var yAxis = d3.svg.axis() .scale(y) .orient("left") .ticks(10); // add the SVG element var svg = d3.select("body").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 + ")"); // load the data data.forEach(function(d) { d.Letter = d.Letter; d.Freq = +d.Freq; // scale the range of the data x.domain(data.map(function(d) { return d.Letter; })); y.domain([0, d3.max(data, function(d) { return d.Freq; })]); // add axis svg.append("g") .attr("class", "x axis") .attr("transform", "translate(0," + height + ")") .call(xAxis) .selectAll("text") .style("text-anchor", "end") .attr("dx", "-.8em") .attr("dy", "-.55em") .attr("transform", "rotate(-90)" ); svg.append("g") .attr("class", "y axis") .call(yAxis) .append("text") .attr("transform", "rotate(-90)") .attr("y", 5) .attr("dy", ".71em") .style("text-anchor", "end") .text("Frequency"); // Add bar chart svg.selectAll("bar") .data(data) .enter().append("rect") .attr("class", "bar") .attr("x", function(d) { return x(d.Letter); }) .attr("width", x.rangeBand()) .attr("y", function(d) { return y(d.Freq); }) .attr("height", function(d) { return height - y(d.Freq); }); }); </script> </body>
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