Stacked Bar Chart

index.html

<div class="widget">
    <div class="header">Stacked Bar Chart</div>
    <div id="chart" class="chart-container">

    </div>
</div>

script.js

var data = [
        {month: 'Jan', A: 20, B: 5, C: 10},
        {month: 'Feb', A: 30, B: 10, C: 20}
    ];


    var xData = ["A", "B", "C"];

    var margin = {top: 20, right: 50, bottom: 30, left: 0},
            width = 350 - margin.left - margin.right,
            height = 300 - margin.top - margin.bottom;

    var x = d3.scale.ordinal()
            .rangeRoundBands([0, width], .35);

    var y = d3.scale.linear()
            .rangeRound([height, 0]);

    var color = d3.scale.category20();

    var xAxis = d3.svg.axis()
            .scale(x)
            .orient("bottom");

    var svg = d3.select("#chart").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 dataIntermediate = xData.map(function (c) {
        return data.map(function (d) {
            return {x: d.month, y: d[c]};
        });
    });

    var dataStackLayout = d3.layout.stack()(dataIntermediate);

    x.domain(dataStackLayout[0].map(function (d) {
        return d.x;
    }));

    y.domain([0,
        d3.max(dataStackLayout[dataStackLayout.length - 1],
                function (d) { return d.y0 + d.y;})
        ])
      .nice();

    var layer = svg.selectAll(".stack")
            .data(dataStackLayout)
            .enter().append("g")
            .attr("class", "stack")
            .style("fill", function (d, i) {
                return color(i);
            });

    layer.selectAll("rect")
            .data(function (d) {
                return d;
            })
            .enter().append("rect")
            .attr("x", function (d) {
                return x(d.x);
            })
            .attr("y", function (d) {
                return y(d.y + d.y0);
            })
            .attr("height", function (d) {
                return y(d.y0) - y(d.y + d.y0);
            })
            .attr("width", x.rangeBand());

    svg.append("g")
            .attr("class", "axis")
            .attr("transform", "translate(0," + height + ")")
            .call(xAxis);

scripts

<script src="//cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>

stacked-bar-chart.markdown

Stacked Bar Chart

A Pen by JANA on CodePen.

License.

style.css

body {
    background-color: #ccc;
    width: 100%;
    font-family: 'Roboto', sans-serif;
    height: 100%;
}

.widget {
    margin: 0 auto;
    width:350px;
    margin-top:50px;
    background-color:#fff;
    -background-color: #222D3A;
    border-radius: 5px;
    box-shadow: 1px 1px 4px 0px rgba(0,0,0,0.3);

}

.header{
    background-color: #eee;
    height:40px;
    color:#555;
    text-align: center;
    line-height: 40px;
    border-top-left-radius: 7px;
    border-top-right-radius: 7px;
    font-weight: 400;
    font-size: 1.5em;
    text-shadow: 1px 1px #fff;
    border-bottom: 1px solid #eaeaea;
}

.chart-container{
    padding:25px;
}

.axis path,
.axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}

styles

<link href="https://fonts.googleapis.com/css?family=Roboto:400,700,500" rel="stylesheet" />
<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" rel="stylesheet" />