Joyplot Update Pattern II

Another updating joyplot, this one with labels and an axis and some more reasonable design decisions. See also Joyplot Update Pattern.

<!DOCTYPE html>
<html>
<head>
  <style>
    body {
      margin: 0;
      font-family: "Helvetica Neue", sans-serif;
    }
    .area {
      fill: steelblue;
      stroke: #fff;
    }
    .area:nth-child(odd){
      fill: lightskyblue;
    }
    .line {
      fill: #fff;
    }
    .baseline {
      stroke: #000;
      shape-rendering: crispEdges;
    }
    .baseline:last-of-type {
      display: none;
    }
    .line-label {
      text-anchor: end;
      font-size: .8em;
    }
    .line-label:nth-child(odd){
      fill: #888;
    }
  </style>
</head>
<body>
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <script src="https://unpkg.com/jeezy@1.11.0/lib/jeezy.min.js"></script>
  <script>

var alpha = "Annie,Bob,Christina,Dylan,Elizabeth,Fred,Gertrude,Isaiah,Jennifer".split(",");

var margin = {top: 50, left: 75, bottom: 50, right: 10}, width = window.innerWidth - margin.right - margin.left, height = window.innerHeight - margin.top - margin.bottom;

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 + ")");

var y_wrapper = d3.scaleBand()
      .rangeRound([0, height])
      .domain(alpha);

var y = d3.scaleLinear()
      .range([y_wrapper.bandwidth(), 0])
      .domain([0, 100]);

var x = d3.scaleLinear()
      .range([0, width])
      .domain([0, 100]);

var area = d3.area()
      .x(function(d){ return x(d.day); })
      .y1(function(d) { return y(d.value * 2); })
      .y0(y(0))
      .curve(d3.curveBasis);

svg.append("g")
    .attr("class", "axis x")
    .attr("transform", "translate(0, " + (height - 2) + ")")
    .call(d3.axisBottom(x))
  
  drawChart(makeData());

d3.interval(function(){drawChart(makeData())}, 1000);

function drawChart(data){

// labels
    svg.selectAll(".line-label")
        .data(data, function(d){ return d.id; })
      .enter().append("text")
        .attr("class", "line-label")
        .attr("x", -5)
        .attr("y", function(d) { return y_wrapper(d.id) + y_wrapper.bandwidth() - 3; })
        .text(function(d){ return d.id; });

// baselines
    svg.selectAll(".baseline")
        .data(data, function(d){ return d.id; })
      .enter().append("line")
        .attr("class", "baseline")
        .attr("x1", 0)
        .attr("x2", width)
        .attr("y1", function(d) { return y_wrapper(d.id) + y_wrapper.bandwidth(); })
        .attr("y2", function(d) { return y_wrapper(d.id) + y_wrapper.bandwidth(); });

// JOIN
    var area_path = svg.selectAll(".area")
        .data(data, function(d){ return d.id; });

// UDATE
    area_path
      .transition()
        .attr("d", function(d){ return area(d.data); });
    
    // ENTER
    area_path.enter().append("path")
        .attr("class", "area")
        .attr("transform", function(d) { return "translate(0, " + (y_wrapper(d.id) - 1.5) + ")"; })
        .attr("d", function(d){ return area(d.data); });

}

</script>

</body>
</html>

https://d3js.org/d3.v4.min.js

https://unpkg.com/jeezy@1.11.0/lib/jeezy.min.js