simple line chart from dataset

forked from romsson's block: simple line chart from dataset

forked from anonymous's block: simple line chart from dataset

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v3.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
    .line {
      fill: none;
      stroke: black;
      stroke-width: 1.5px;
    }
  </style>
</head>

<body>
  <script>
    // Feel free to change or delete any of the code you see in this editor!
    var svg = d3.select("body").append("svg")
      .attr("width", 960)
      .attr("height", 500)
    var width = 800;
    var height = 400;
    // https://bl.ocks.org/zanarmstrong/raw/05c1e95bf7aa16c4768e/
    var parseDate = d3.time.format("%Y-%m");
    var displayDate = d3.time.format("%b %y");
    var displayValue = d3.format(",.0f");
    
    // Ordinal scale
    var x = d3.scale.ordinal()
        .rangeRoundBands([0, width], .5);
    var y = d3.scale.linear()
        .range([height, height - 200]);
    var line = d3.svg.line()
        .x(function(d) { return x(d.name); })
        .y(function(d) { return y(d.value); });
    
    var g = svg.append("g")
    	.attr("transform", "translate(20, 0)")
    
   	d3.json("dataset.json", function(data) {
      // Pre-processing
      data.forEach(function(d) {
				d.value;// = +d.value;
        d["date"] = parseDate.parse(d["date"]);
      });
      
      x.domain(data.map(function(d) { return d.name; }));
			y.domain([0, d3.max(data, function(d) { return d.value; })]);
      
      svg.selectAll("text").data(data).enter()
       .append("text")
        .text(function(d, i) { return displayDate(d.date); })
        .attr("y", 420)
        .attr("x", function(d) { return x(d.name); })
        .style("font-size", 10)
        .style("font-family", "monospace")
        .style("fill", "black");
      
      //on écrit les valeurs en blanc pour les rendre invisibles
      g.selectAll(".value").data(data).enter()
       .append("text")
        .text(function(d, i) { return displayValue(d.value); })
        .attr("class", "value")
        .attr("y", function(d) { return y(d.value)-10; })
        .attr("x",function(d) { return x(d.name)-10;})
        .style("font-size", 20)
        .style("font-family", "monospace")
        .style("fill", "white");
      
      
       
      
      g.selectAll("path").data([data]).enter().append("path")
        .attr("class", "line")
        .attr("d", line);
      // .style("stroke-dasharray", ("3, 3"));
      
      
      
      g.selectAll("line").data(data).enter().append("line")  // attach a line
          .attr("class", "ligne")
    			.style("stroke", "white")                   // colour the line in white
          .style("stroke-dasharray", ("3, 3"))             // dashes
      		.attr("x1", function(d) {return x(d.name);})     // x position of the first end of the line
    			.attr("y1", function(d) {return y(d.value);})      // y position of the first end of the line
    	    .attr("x2",function(d) {return x(d.name);} )     // x position of the second end of the line
    			.attr("y2",400 )
      
      
      g.selectAll("dot")
        .attr("id",function (d,i) {return "id_"+i;})
        .data(data)
        .enter().append("circle")
        .attr("r", 8)
        .attr("cx", function(d) { return x(d.name); })
        .attr("cy", function(d) { return y(d.value); })
        .style("fill", "grey")
        .style("opacity", 0.5)
        .on("mouseover", function(d) {
      	d3.select(this).style("fill", "red").style("opacity", 1);
        d3.selectAll(".value").filter(function(e) {
          return d === e;
        }).style("fill", "black")
        d3.selectAll(".ligne").filter(function(e) {
          return d === e;
        }).style("stroke", "black");
        })
    
        .on("mouseout", function(d) {
      	d3.select(this).style("fill","grey").style("opacity",0.5) 
           	d3.selectAll(".value").style("fill","white")
            d3.selectAll(".ligne").style("stroke","white");
        })
      
    });
  </script>
</body>

https://d3js.org/d3.v3.min.js