Simple stream + interpolation, layout offset & axes by devgru

index.html

<!DOCTYPE html>
<meta charset='utf-8'>
<style>
    body { font: 10px sans-serif; }
    p { font: 12px helvetica; }

    .axis path, .axis line {
        fill: none;
        stroke: #000;
        stroke-width: 2px;
        shape-rendering: crispEdges;
    }
</style>
<body>
<script src='//d3js.org/d3.v3.js'></script>
<script src='//d3js.org/colorbrewer.v1.js'></script>
<script>
    var format = d3.time.format('%m/%d/%y')
    var margin = {top: 20, right: 40, bottom: 30, left: 30}
    var width = 600 - margin.left - margin.right
    var height = 400 - margin.top - margin.bottom
    var x = d3.time.scale().range([0, width])
    var y = d3.scale.linear().range([height - 10, 0])
    var color = d3.scale.ordinal().range(colorbrewer['Blues'][6])

    var xAxis = d3.svg.axis()
            .scale(x)
            .orient('bottom')
    var yAxis = d3.svg.axis()
            .scale(y)

    var area = d3.svg.area()
            .interpolate('cardinal')
            .x(function(d) { return x(d.date) })
            .y0(function(d) { return y(d.y0) })
            .y1(function(d) { return y(d.y0 + d.y) })

    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 + ')')

    function prepareData(data) {
        var nest = d3.nest().key(function(d) { return d.key })

        var stack = d3.layout.stack()
                .offset('silhouette') // wiggle
                .values(function(d) { return d.values })
                .x(function(d) { return d.date })
                .y(function(d) { return d.value })

        return stack(nest.entries(data))
    }

    d3.csv('//nemetz.devg.ru/d3/stream.csv', function (d) {
        d.date = format.parse(d.date)
        d.value = Number(d.value)
        return d
    }, function (data) {
        var layers = prepareData(data)

        x.domain(d3.extent(data, function (d) { return d.date }))
        y.domain([0, d3.max(data, function (d) { return d.y0 + d.y })])

        svg.selectAll('.layer')
                .data(layers)
                .enter().append('path')
                .attr('class', 'layer')
                .attr('d', function (d) { return area(d.values) })
                .style('fill', function (d, i) { return color(i) })

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

        svg.append('g')
                .attr('class', 'y axis')
                .attr('transform', 'translate(' + width + ', 0)')
                .call(yAxis.orient('right'))

        svg.append('g')
                .attr('class', 'y axis')
                .call(yAxis.orient('left'))
    })
</script>