simple D3 line chart

copied from: https://leanpub.com/D3-Tips-and-Tricks/read#leanpub-auto-starting-with-a-basic-graph

by Matt Howey

HTML

<body></body>
http://jsfiddle.net/fiatjaf/aK6DP/#update

CSS

body {
  font: 12px Arial;
}

path {
  stroke: steelblue;
  stroke-width: 2;
  fill: none;
}

.axis path,
.axis line {
  fill: none;
  stroke: grey;
  stroke-width: 1;
  shape-rendering: crispEdges;
}

JavaScript

var margin = {
  top: 30,
  right: 20,
  bottom: 30,
  left: 50
};
var width = 600 - margin.left - margin.right;
var height = 270 - margin.top - margin.bottom;

var parseDate = d3.time.format("%d-%b-%y").parse;

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

var xAxis = d3.svg.axis().scale(x)
  .orient("bottom").ticks(5);

var yAxis = d3.svg.axis().scale(y)
  .orient("left").ticks(5);

var valueline = d3.svg.line()
  .x(function(d) {
    return x(d.date);
  })
  .y(function(d) {
    return y(d.close);
  });

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 + ")");

// Get the data
var data = [{
  date: "1-May-12",
  close: "58.13"
}, {
  date: "30-Apr-12",
  close: "53.98"
}, {
  date: "27-Apr-12",
  close: "67.00"
}, {
  date: "26-Apr-12",
  close: "89.70"
}, {
  date: "25-Apr-12",
  close: "99.00"
}];

data.forEach(function(d) {
  d.date = parseDate(d.date);
  d.close = +d.close;
});

// Scale the range of the data
x.domain(d3.extent(data, function(d) {
  return d.date;
}));
y.domain([0, d3.max(data, function(d) {
  return d.close;
})]);

svg.append("path") // Add the valueline path.
  .attr("d", valueline(data));

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

svg.append("g") // Add the Y Axis
  .attr("class", "y axis")
  .call(yAxis);