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dji.js
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dji.js
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var margin = {top: 19, right: 20, bottom: 20, left: 19},
width = 960 - margin.right - margin.left, // width
height = 136 - margin.top - margin.bottom, // height
cellSize = 17; // cell size
var day = d3.time.format("%w"),
week = d3.time.format("%U"),
percent = d3.format(".1%"),
format = d3.time.format("%Y-%m-%d");
var color = d3.scale.quantize()
.domain([-.05, .05])
.range(d3.range(9));
var svg = d3.select("#chart").selectAll("svg")
.data(d3.range(1990, 2011))
.enter().append("svg")
.attr("width", width + margin.right + margin.left)
.attr("height", height + margin.top + margin.bottom)
.attr("class", "RdYlGn")
.append("g")
.attr("transform", "translate(" + (margin.left + (width - cellSize * 53) / 2) + "," + (margin.top + (height - cellSize * 7) / 2) + ")");
svg.append("text")
.attr("transform", "translate(-6," + cellSize * 3.5 + ")rotate(-90)")
.attr("text-anchor", "middle")
.text(String);
var rect = svg.selectAll("rect.day")
.data(function(d) { return d3.time.days(new Date(d, 0, 1), new Date(d + 1, 0, 1)); })
.enter().append("rect")
.attr("class", "day")
.attr("width", cellSize)
.attr("height", cellSize)
.attr("x", function(d) { return week(d) * cellSize; })
.attr("y", function(d) { return day(d) * cellSize; })
.datum(format);
rect.append("title")
.text(function(d) { return d; });
svg.selectAll("path.month")
.data(function(d) { return d3.time.months(new Date(d, 0, 1), new Date(d + 1, 0, 1)); })
.enter().append("path")
.attr("class", "month")
.attr("d", monthPath);
d3.csv("dji.csv", function(csv) {
var data = d3.nest()
.key(function(d) { return d.Date; })
.rollup(function(d) { return (d[0].Close - d[0].Open) / d[0].Open; })
.map(csv);
rect.filter(function(d) { return d in data; })
.attr("class", function(d) { return "day q" + color(data[d]) + "-9"; })
.select("title")
.text(function(d) { return d + ": " + percent(data[d]); });
});
function monthPath(t0) {
var t1 = new Date(t0.getFullYear(), t0.getMonth() + 1, 0),
d0 = +day(t0), w0 = +week(t0),
d1 = +day(t1), w1 = +week(t1);
return "M" + (w0 + 1) * cellSize + "," + d0 * cellSize
+ "H" + w0 * cellSize + "V" + 7 * cellSize
+ "H" + w1 * cellSize + "V" + (d1 + 1) * cellSize
+ "H" + (w1 + 1) * cellSize + "V" + 0
+ "H" + (w0 + 1) * cellSize + "Z";
}