D3 Examples - simple bar chat dataset

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<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
    rect {
      fill: none;
      stroke: black;
      stroke-width: 1px;
    }
  </style>
</head>
​
<body>
  <script>
​
    var svg = d3.select("body").append("svg")
      .attr("width", 960)
      .attr("height", 500);
​
    // var data = [22, 32, 21, 23, 10, 22, 11, 19, 30, 50];
    
    // No domain (yet!)
    var x = d3.scaleLinear().range([0, 500]);
    var y = d3.scaleLinear().range([0, 100])
    
    var g = svg.append("g").attr("transform", "translate(100, 0)");
    
        d3.text('dataset.csv', function(error, raw) {
    
      console.log(raw);
      
      // https://github.com/d3/d3-dsv
        var dsv = d3.dsvFormat(';')
        var data = dsv.parse(raw);
    
      // Domain after data have been loaded!
      x.domain([0, data.length -1]);
      
      // Accessor for value
      y.domain([0, d3.max(data, function(d) { return d.value; })]);
      // lui specifie de maximiser en fonction du champ value sur les donnes
      
      g.selectAll("text").data(data).enter().append("text")
        .text(function(d) { return d.name; })
        .attr("y", 200)
        .attr("x", function(d, i) { return x(i) + 20; })
        .style("font-size", 12)
        .style("font-family", "monospace");
      
    
    g.selectAll("rect").data(data).enter().append("rect")
            .attr("width",40)
            .attr("x",function(d,i){return x(i) +5; })
            .attr("y",200)
            .attr("height",function(d){ return 190 -y(d.value); })
    
    setInterval(function(){
      data.forEach(function (d) {
         d.value = Math.random();
      })
    //data = data.concate((name:"XXX",value: 10)) // pour rajouter une valeur aux dnnnes
     y.domain([0, d3.max(data, function(d) { return d.value; })]);
      //mise a jour des donnes 
       g.selectAll("rect").data(data)
        .transition().duration(100).delay(function(d,i){
         return i *100;
       })
            .attr("y",function(d){return 190- y(d.value) ;})
            .attr("height",function(d){ return  y(d.value); })
    
     },500) 
      
      
    });
  </script>
</body>
​
    