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Transforming Bar Chart
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| <!DOCTYPE html> | |
| <html> | |
| <style type="text/css"> | |
| .axis { | |
| font: 10px sans-serif; | |
| } | |
| .axis path, | |
| .axis line { | |
| fill: none; | |
| stroke: #000; | |
| shape-rendering: crispEdges; | |
| } | |
| .x.axis path { | |
| display: none; | |
| } | |
| body { | |
| font-family: 'Roboto', sans-serif; | |
| } | |
| </style> | |
| <body> | |
| <link href='http://fonts.googleapis.com/css?family=Roboto:300' rel='stylesheet' type='text/css'> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.6/d3.min.js" charset="utf-8"></script> | |
| <script src="https://code.jquery.com/jquery-2.1.4.min.js"></script> | |
| <script> | |
| var data = [ | |
| {label: "apples", value: 10}, | |
| {label: "oranges", value: 10}, | |
| {label: "bananas", value: 20}, | |
| {label: "durians", value: 30}, | |
| {label: "watermelon", value: 50}, | |
| {label: "grapefruit", value: 80}, | |
| {label: "strawberries", value: 100} | |
| ]; | |
| var margins = {left:50, top:50, right:50, bottom:50}; | |
| var width = 960 - margins.left - margins.right; | |
| var height = 500 - margins.top - margins.bottom; | |
| var color = d3.scale.category20(); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width + margins.left + margins.right) | |
| .attr("height", height + margins.top + margins.bottom) | |
| .append("g") | |
| .attr("transform", "translate(" + margins.left + "," + margins.top + ")"); | |
| var xScale = d3.scale.ordinal() | |
| .domain(data.map(function (d) { return d.label })) | |
| .rangeRoundBands([0,width],0.2); | |
| var xAxis = d3.svg.axis().scale(xScale).orient("bottom"); | |
| var yScale = d3.scale.linear() | |
| .domain([0,d3.max(data, function(d) { return d.value; })]) | |
| .range([height,0]); | |
| var yAxis = d3.svg.axis().scale(yScale).orient("left"); | |
| var dataSum = d3.sum(data, function (d) { return d.value }); | |
| var percentageScale = d3.scale.linear() | |
| .domain([0,dataSum]) | |
| .range([0,height]); | |
| svg.append("g") | |
| .attr("class", "x axis") | |
| .attr("transform", "translate(0," + height + ")") | |
| .call(xAxis); | |
| svg.append("g") | |
| .attr("class", "y axis") | |
| .call(yAxis) | |
| .append("text") | |
| .attr("transform", "rotate(-90)") | |
| .attr("y", 6) | |
| .attr("dy", ".71em") | |
| .style("text-anchor", "end") | |
| .text("Frequency"); | |
| var barGroups = svg.selectAll(".barGroup") | |
| .data(data,function (d) {return d.label; }) | |
| .enter().append("g") | |
| .attr("class", "barGroup") | |
| .attr("transform", function (d,i) { | |
| return "translate(" + xScale(d.label) + "," + yScale(d.value) + ")" ; | |
| }); | |
| barGroups.append("rect") | |
| .attr("class", "bar") | |
| .attr("width", xScale.rangeBand()) | |
| .attr("height", function(d) { return height - yScale(d.value); }) | |
| .attr("fill", function (d,i) {return color(i) }); | |
| function sumToIndex(array, index, accessor) { | |
| var sum = 0; | |
| if (index >= 0){ | |
| for (var i = 0; i <= index; i ++) { | |
| sum += array[i][accessor]; | |
| } | |
| } | |
| return sum; | |
| } | |
| function regularChart() { | |
| barGroups | |
| .transition().duration(500) | |
| .attr("transform", function (d,i) { | |
| return "translate(" + xScale(d.label) + "," + yScale(d.value) + ")" ; | |
| }); | |
| barGroups.select("rect") | |
| .transition().duration(500) | |
| .attr("height", function(d) { return height - yScale(d.value); }); | |
| barGroups.selectAll("text") | |
| .remove(); | |
| $(".axis").show(); | |
| } | |
| function percentageChart() { | |
| barGroups.transition().duration(500) | |
| .attr("transform", function (d,i) { | |
| return "translate(" + (width/2 - xScale.rangeBand()) + "," + percentageScale(sumToIndex(data,i-1,"value")) + ")"; | |
| }); | |
| barGroups.select(".bar") | |
| .transition().duration(500) | |
| .attr("height", function(d,i) { | |
| return percentageScale(sumToIndex(data,i,"value")) - percentageScale(sumToIndex(data,i-1,"value")); | |
| }) | |
| barGroups.append("text") | |
| .text(function (d,i) { | |
| return d.label + "(" +d3.round(d.value/dataSum * 100,1) + "%)"; | |
| }) | |
| .attr("fill", "white") | |
| .attr("font-size", "10px") | |
| .attr("transform", function (d,i) { | |
| var verticalMidshift = (percentageScale(sumToIndex(data,i,"value")) - percentageScale(sumToIndex(data,i-1,"value")))/2 + 3; | |
| return "translate(5," + verticalMidshift + ")"; | |
| }) | |
| .transition().duration(500).delay(1000) | |
| .attr("fill", "black") | |
| .attr("transform", function (d,i) { | |
| var verticalMidshift = (percentageScale(sumToIndex(data,i,"value")) - percentageScale(sumToIndex(data,i-1,"value")))/2 + 3; | |
| return "translate(-" + this.getComputedTextLength() + "," + verticalMidshift + ")"; | |
| }) | |
| $(".axis").hide(); | |
| } | |
| var counter = 0; | |
| d3.select("body") | |
| .on("click", function () { | |
| if (counter % 2 === 0) | |
| percentageChart(); | |
| else | |
| regularChart(); | |
| counter++; | |
| }) | |
| </script> | |
| </body> | |
| </html> |
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