By | January 8, 2016

Creating Bar chart in Birt using d3.js

Ref my previous tutorial for setting up Birt environment and creating simple project. Previous Post

Step 1 – Right click on project and create new report.

Step 2 – Drag Text from right menu bar

Step 3 – Copy and paste the below code

<!DOCTYPE html>
 <meta charset="utf-8">
 <head>
    <style>
    .axis {
      font: 10px sans-serif;
    }
    .axis path,
    .axis line {
      fill: none;
      stroke: #000;
      shape-rendering: crispEdges;
    }
    </style>
 </head>
 <body>
 <script src="http://d3js.org/d3.v3.min.js"></script>
 <script>
 var margin = {top: 20, right: 20, bottom: 70, left: 40},
     width = 600 - margin.left - margin.right,
     height = 300 - margin.top - margin.bottom;
 // Parse the date / time
 var       parseDate = d3.time.format("%Y-%m").parse;
 var x = d3.scale.ordinal().rangeRoundBands([0, width], .05);
 var y = d3.scale.linear().range([height, 0]);
 var xAxis = d3.svg.axis()
     .scale(x)
     .orient("bottom")
     .tickFormat(d3.time.format("%Y-%m"));
 var yAxis = d3.svg.axis()
     .scale(y)
     .orient("left")
     .ticks(10);
 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 + ")");
 d3.csv("bar-data.csv", function(error, data) {
     data.forEach(function(d) {
         d.date = parseDate(d.date);
         d.value = +d.value;
     });
  x.domain(data.map(function(d) { return d.date; }));
   y.domain([0, d3.max(data, function(d) { return d.value; })]);
   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", 6)
       .attr("dy", ".71em")
       .style("text-anchor", "end")
       .text("Value ($)");
   svg.selectAll("bar")
       .data(data)
     .enter().append("rect")
       .style("fill", "steelblue")
       .attr("x", function(d) { return x(d.date); })
       .attr("width", x.rangeBand())
       .attr("y", function(d) { return y(d.value); })
       .attr("height", function(d) { return height - y(d.value); });
 });
 </script>
 </body>

Ref Example – http://bl.ocks.org/d3noob/8952219#bar-data.csv

Step 4 – Now run the report As HTML

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