simple bar chat updates

forked from romsson's block: simple bar chat

forked from romsson's block: simple bar chat from dataset

<!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>

var svg = d3.select("body").append("svg")
      .attr("width", 960)
      .attr("height", 500);

// 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){
    
    	var dsv = d3.dsvFormat(';')
    	var data = dsv.parse(raw);
    
      // Domain after data have been loaded!
      x.domain([0, data.length]);
      
      // Accessor for value
      y.domain([0, d3.max(data, function(d) { return d.value; })]);
      
      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("x", function(d, i) { return x(i); })
        .attr("y", function(d) { return 170 - y(d.value); })
        .attr("height", function(d) { return y(d.value); })
        .attr("width", 500 / data.length);

setInterval(function(d) {
        
        data.forEach(function(d) {
          d.value = Math.random();
        });
        
      	y.domain([0, d3.max(data, function(d) { return d.value; })]);
          
				g.selectAll("rect").data(data).transition()
        	.attr("y", function(d) { return 170 - y(d.value); })
        	.attr("height", function(d) { return y(d.value); })

}, 500);
      
    });
    
  </script>
</body>

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