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(function() {
var transform = function(data) {
// Set up an object and an array to use
var religion_data = { "Known": 0, "Unknown": 0 };
var religion_array = [];
// For each legislator, increment the key associated with their religion
for (var i = 0; i < data.length; i++) {
var d = data[i];
if (!d.bio.religion || d.bio.religion === "Unknown") {
religion_data["Unknown"]++;
} else {
religion_data["Known"]++;
}
}
// Now convert our object to an array for use in the pie chart
for (var e in religion_data) {
religion_array.push({
name: e,
count: religion_data[e]
});
}
return religion_array;
};
var width = 960;
var height = 400;
var radius = Math.min(width, height) / 2;
var pie = d3.layout.pie()
.value(function(d) { return d.count; })
.sort(null);
var container = d3.select("div#d3religion_v1")
.append("svg")
.attr("width", width)
.attr("height", height);
var donut = container.append("g")
.attr("transform", "translate(" + (width / 2) + "," + (height / 2) + ")");
var arc = d3.svg.arc()
.outerRadius(radius)
.innerRadius(radius / 2);
d3.json("/assets/data/legislators-current.json", function(data) {
// Add the arc segments to our visualization
donut.selectAll("path")
.data(pie(transform(data.legislators)))
.enter()
.append("path")
.attr("d", arc)
.attr("fill", function(d) { return d.data.name === "Unknown" ? "#ddd" : "steelblue"; });
});
})();
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