DataVizTP3_SmallMultiple

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

<!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; }
    .line {
      fill: none;
      stroke: black;
      stroke-width: 1.5px;
    }
  </style>
</head>

<body>
  <script>
    
    var margin = {top: 20, right: 30, bottom: 20, left: 100},
      width = 760 - margin.left - margin.right,
      height = 300 - margin.top - margin.bottom;
 
	var parseDate = d3.timeParse("%b %Y");
    
	var x = d3.scaleTime().range([0, width]),
    	y = d3.scaleLinear().range([height/4, 0]),
    	c = d3.scaleOrdinal(d3.schemeCategory10);
    
	var area = d3.area()
  		.curve(d3.curveBasis)
    	.x(function(d) { return x(d.date); })
  		.y1(function(d) { return y(d.price); })
			.y0(height/4);
 
  var line = d3.line()
    .curve(d3.curveBasis)
    .x(function(d) { return x(d.date); })
    .y(function(d) { return y(d.price); });

d3.text("dataset.csv", function(error, raw) {
  	if (error) throw error;
  
  	var data = d3.csvParse(raw);
  
// Nest stock values by symbol.
    var symbols = d3.nest()
        .key(function(d) { return d.symbol; })
        .entries(data);

// Parse and caculate some values for each symbols
    symbols.forEach(function(s){
      s.values.forEach(function(d){
        d.date = parseDate(d.date);
        d.price = +d.price;
      });
      
      s.maxPrice = d3.max(s.values, function(d) { return d.price; });
      s.sumPrice = d3.sum(s.values, function(d) { return d.price; });
      
      console.log(symbols);
    });

x.domain(d3.extent(data, function(d) { return d.date; }));
	y.domain([0, d3.max(symbols.map(function(d) { return d.maxPrice; }))])
  
  
  // dessiner les small multiples
    
		// Add an SVG element for each symbol, with the desired dimensions and margin.
 	var svg = d3.select("body").selectAll("svg")
      .data(symbols)
    	.enter().append("svg")
      .attr("width", width + margin.left + margin.right)
      .attr("height", height/4 + margin.top + margin.bottom)
    	.append("g")
      .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

// Add the area path elements. Note: the y-domain is set per element.
  	svg.append("path")
      .attr("class", "area")
      .attr("d", function(d) { y.domain([0, d.maxPrice]); return area(d.values); })
    	.attr("fill", function(d) { return c(d.key); })
      .attr("stroke", function(d) { return c(d.key); });;

// Add the line path elements. Note: the y-domain is set per element.
  	svg.append("path")
      .attr("class", "line")
      .attr("d", function(d) { y.domain([0, d.maxPrice]); return line(d.values); })
      .attr("stroke", function(d) { return c(d.key); })
    	.style("stroke", function(d) { return c(d.key); });

// Add a small label for the symbol name.
  svg.append("text")
      .attr("x", width - 6)
      .attr("y", (height - 6)/4)
      .style("text-anchor", "end")
      .text(function(d) { return d.key; });
    
    
    // dessiner les axes
    svg.append("g")
        .attr("class", "axis axis--x")
        .attr("transform", "translate(0," + height/4 + ")")
        .call(d3.axisBottom(x));

svg.append("g")
        .attr("class", "axis axis--y")
        .call(d3.axisLeft(y).ticks(20));
      
  });

</script>
</body>

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