TP3-p3-2

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

forked from Rade-Mathis's block: TP3-p3-1

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
    
		svg {
  		font: 10px sans-serif;
		}
    
    .line {
      fill: none;
      stroke: black;
      stroke-width: 2.5px;
    }
  </style>
</head>

<body>
  <script>
    
    var margin = {top: 20, right: 70, bottom: 20, left: 100};
    var width = 760 - margin.left - margin.right;
    var height = 150 - margin.top - margin.bottom;
    
    // See formats https://bl.ocks.org/zanarmstrong/raw/05c1e95bf7aa16c4768e/
    // Data sample {"name": "G", "value": 10, "date": "2016-07"}
    var parseDate = d3.timeParse("%b %Y");
    var displayDate = d3.timeFormat("%y");
    var displayValue = d3.format(",.0f");
    
    // Ordinal scale
    var x = d3.scaleTime()
        .range([0, width]);

// Linear scale
    var y = d3.scaleLinear()
        .range([height, 0]);
    
    var color = d3.scaleOrdinal(d3.schemeCategory10);
   
    var area = d3.area()
    	.curve(d3.curveBasis)
    	.x(function(d) { return x(d.date); })
    	.y0(height)
    	.y1(function(d) { return y(d.price); });
    
    d3.text(
      "https://gist.githubusercontent.com/mbostock/1256572/raw/44c086a6019de56dce35a47197a19468b3e4ad57/stocks.csv", 
      function (err,rawData) {
    		
        var dsv  = d3.dsvFormat (',') ;
        var data = dsv.parse (rawData) ;
        data.forEach(function(d) {
					d.price = +d.price;
        	d.date = parseDate(d.date);
      	});
        var n_data = d3.nest ()
        	.key (function (d) { return d.symbol ; })
        	.entries (data) ;
       
				n_data.forEach (function (act) {
          act.max_price = d3.max (act.values, 
                                  function (d) { return d.price ; })
          /*act.values.forEach (function (val, i_val) {
            var price = val.price ;
            var lower_price = 0 ;
            n_data.forEach (function (other_act) {
              var other_price = other_act.values[i_val].price ;
              if (other_price < price) {
                lower_price = Math.max (lower_price, other_price) ;
              }
            })
            val.lower_price = lower_price ;
          })*/
        });
        
        console.log(n_data);
        
        svg = d3.select("body").selectAll("svg")
    			.data (n_data)
        	.enter().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 g = svg.append("g");
      
     	  x.domain(d3.extent(data, function(d) { return d.date; }));
			  y.domain([0, d3.max(data, function(d) { return d.price; })]);
        
    		svg.append("g")
        	.attr("class", "axis axis--x")
       	 	.attr("transform", "translate(0," + height + ")")
       	 	.call(d3.axisBottom(x));
        
      	svg.append("g")
        	.attr("class", "axis axis--y")
        	.attr("transform", "translate(0,0)")
        	.call(d3.axisLeft(y).ticks(5));

svg.append("path")
          .attr("class", "area")
        	.attr("d", function (d) { return area (d.values) } )
      		.attr("fill", function(d,i) { return color (d.key) ; })
        	.attr("transform", "translate(1,0)"); // don't overlap legend ...
        
      	var legend = svg.append("g")
    			.data(color.domain())
  				//.enter().append("g")
  		  	.attr("class", "legend")
  		  	.attr("transform", "translate("+ (width - 10) + ","
                + (height / 2) + ")") ;

legend.append("rect")
     			.attr("x", 30)
     			.attr("width", 18)
     			.attr("height", 18)
     			.style("fill", color);

legend.append("text")
      		.attr("x", 50)
      		.attr("y", 9)
      		.attr("dy", ".35em")
      		.style("text-anchor", "start")
      		.text(function(d) { return d; });

});

</script>
</body>

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