Simple D3 line chart example - d3.js

Question

I'm a D3 newbie and having a slow time getting up to speed on this library. I am trying to get this simple D3 area chart to work but am having some trouble displaying the actual area it self. I can get the axis to display correctly with the right ranges for the data, but no area displays on the graph itself.
I am feeding it JSON data that looks like this and it appears to be consuming the data fine as best as I can tell.
[{"Date":"Date","Close":"Close"},{"Date":"20130125","Close":"75.03"},{"Date":"20130124","Close":"75.32"},{"Date":"20130123","Close":"74.29"},{"Date":"20130122","Close":"74.16"},{"Date":"20130118","Close":"75.04"},{"Date":"20130117","Close":"75.26"},{"Date":"20130116","Close":"74.34"},{"Date":"20130115","Close":"76.94"},{"Date":"20130114","Close":"76.55"}]
This is my code
var margin = {top: 20, right: 20, bottom: 30, left: 50},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
var parseDate = d3.time.format("%Y%m%d").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");
var yAxis = d3.svg.axis()
.scale(y)
.orient("left");
var area = d3.svg.area()
.x(function(d) { return x(d.Date); })
.y0(height)
.y1(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 + ")");
d3.json('JSONstockPriceOverTime.php', function (data) {
data.forEach(function(d) {
d.Date = parseDate(d.Date);
d.Close = +d.Close;
});
x.domain(d3.extent(data, function(d) { return d.Date; }));
y.domain([0, d3.max(data, function(d) { return d.Close; })]);
svg.append("path")
.datum(data)
.attr("class", "area")
.attr("d", area);
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
svg.append("g")
.attr("class", "y axis")
.call(yAxis)
.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("Price ($)");
});
And I have this style applied
<style>
body {
font: 10px sans-serif;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.area {
fill: steelblue;
}
</style>

Answer 1

Remove the starting part of the json (JSONstockPriceOverTime.php) file;
{"Date":"Date","Close":"Close"},
Since it has the 'Date' and 'Close' variables defined as part of the json format, you won't be required to include header information like a csv file, and add 'error' into your json load line
d3.json("JSONstockPriceOverTime.php", function(error, data) {
and you should be all go (worked for me).
You're making good progress.