Köln ALG 2 - Time Data

<!DOCTYPE html>
<meta charset="utf-8">
<head>
	<meta charset="utf-8">
	<title>Line Chart with Multiple Lines</title>
	<style type="text/css">

<style>

body {
	background-color: white;
	font-family: Helvetica, Arial, sans-serif;
}

h1 {
	font-size: 50px;
	margin: 0;
	font-family: Helvetica, Arial, sans-serif;
}

p {
	font-size: 16px;
	margin: 10px 0 0 0;
	font-family: Helvetica, Arial, sans-serif;
}

svg {
  font: 10px sans-serif;
}

.axis path,
.axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}

.x.axis path {
  fill:none;
  stroke:#000;
  shape-rendering: crispEdges;
}

.line {
  fill: none;
  stroke-width: 1.5px;
}

.axis text {
	font-family: sans-serif;
	font-size: 11px;
}

</style>
<body>
		<h1>Veedel Köln: Alg II</h1>
		<p>ALG II: Source: <a href="https://www.offenedaten-koeln.de/dataset/resource/95ecfe27-83c4-4b7a-8644-a37d5f4fe010">Offene Daten Köln</a>, 2014</p>

var margin = {top: 20, right: 80, bottom: 30, left: 50},
    width = 900 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

var parseDate = d3.time.format("%Y").parse;

var x = d3.time.scale()
    .range([0,width]);

var y = d3.scale.linear()
    .range([height,0]);

var color = d3.scale.category10();

var xAxis = d3.svg.axis()
    .scale(x)
    .orient("bottom");

var yAxis = d3.svg.axis()
    .scale(y)
    .orient("left");

var line = d3.svg.line()
    .interpolate("basis")
    .x(function(d) { return x(d.jahr); })
    .y(function(d) { console.log(d); return y(d.zahl); });

var svg = d3.select("body").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 + ")");

d3.csv("alg2.csv", function(error, data) {

color.domain(d3.keys(data[0]).filter(function(key) { return key == "zeile"; }));

// first we need to corerce the data into the right formats

data = data.map( function (d) {
    return {
      zeile: d.zeile,
      jahr: parseDate(d.jahr),
      zahl: +d.zahl };
});

// then we need to nest the data on city since we want to only draw one
// line per city
  data = d3.nest().key(function(d) { return d.zeile; }).entries(data);

x.domain([d3.min(data, function(d) { return d3.min(d.values, function (d) { return d.jahr; }); }),
             d3.max(data, function(d) { return d3.max(d.values, function (d) { return d.jahr; }); })]);
  y.domain([0, d3.max(data, function(d) { return d3.max(d.values, function (d) { return d.zahl; }); })]);

svg.append("g")
      .attr("class", "x axis")
      .attr("transform", "translate(0," + height + ")")
      .call(xAxis);

svg.append("g")
      .attr("class", "y axis")
      .call(yAxis);

var zeile = svg.selectAll(".zeile")
      .data(data, function(d) { return d.key; })
    .enter().append("g")
      .attr("class", "zeile");

zeile.append("path")
      .attr("class", "line")
      .attr("d", function(d) { return line(d.values); })
      .style("stroke", function(d) { return color(d.key); });

zeile.append("text")
	      .attr("transform", "rotate(-90)")
	      .attr("y", 6)
	      .attr("dy", ".71em")
	      .style("text-anchor", "end")
	      .text("Anzahl ALG-II Empfänger");

});

</script>

Modified http://d3js.org/d3.v3.js to a secure url

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