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// Generated by CoffeeScript 1.9.2
(function() {
var Histogram, root;
root = typeof exports !== "undefined" && exports !== null ? exports : this;
Histogram = (function() {
function Histogram(sample_list1, sample_group) {
this.sample_list = sample_list1;
this.sample_group = sample_group;
this.sort_by = "name";
this.format_count = d3.format(",.0f");
this.margin = {
top: 10,
right: 30,
bottom: 30,
left: 30
};
this.plot_width = 960 - this.margin.left - this.margin.right;
this.plot_height = 500 - this.margin.top - this.margin.bottom;
this.x_buffer = this.plot_width / 20;
this.y_buffer = this.plot_height / 20;
this.plot_height -= this.y_buffer;
this.get_sample_vals(this.sample_list);
this.redraw(this.sample_vals);
}
Histogram.prototype.redraw = function(sample_vals) {
this.sample_vals = sample_vals;
this.y_min = d3.min(this.sample_vals);
this.y_max = d3.max(this.sample_vals) * 1.1;
this.create_x_scale();
this.get_histogram_data();
this.create_y_scale();
$("#histogram").empty();
this.svg = this.create_svg();
return this.create_graph();
};
Histogram.prototype.get_sample_vals = function(sample_list) {
var sample;
return this.sample_vals = (function() {
var i, len, results;
results = [];
for (i = 0, len = sample_list.length; i < len; i++) {
sample = sample_list[i];
if (sample.value !== null) {
results.push(sample.value);
}
}
return results;
})();
};
Histogram.prototype.create_svg = function() {
var svg;
svg = d3.select("#histogram").append("svg").attr("class", "histogram").attr("width", this.plot_width + this.margin.left + this.margin.right).attr("height", this.plot_height + this.margin.top + this.margin.bottom).append("g").attr("transform", "translate(" + this.margin.left + "," + this.margin.top + ")");
return svg;
};
Histogram.prototype.create_x_scale = function() {
var x0;
console.log("min/max:", d3.min(this.sample_vals) + "," + d3.max(this.sample_vals));
x0 = Math.max(-d3.min(this.sample_vals), d3.max(this.sample_vals));
return this.x_scale = d3.scale.linear().domain([d3.min(this.sample_vals), d3.max(this.sample_vals)]).range([0, this.plot_width]).nice();
};
Histogram.prototype.get_histogram_data = function() {
var n_bins;
console.log("sample_vals:", this.sample_vals);
n_bins = 2*Math.sqrt(this.sample_vals.length); //Was originally just the square root, but increased to 2*; ideally would be a GUI for changing this
this.histogram_data = d3.layout.histogram().bins(this.x_scale.ticks(n_bins))(this.sample_vals);
return console.log("histogram_data:", this.histogram_data[0]);
};
Histogram.prototype.create_y_scale = function() {
return this.y_scale = d3.scale.linear().domain([
0, d3.max(this.histogram_data, (function(_this) {
return function(d) {
return d.y;
};
})(this))
]).range([this.plot_height, 0]);
};
Histogram.prototype.create_graph = function() {
this.add_x_axis();
this.add_y_axis();
return this.add_bars();
};
Histogram.prototype.add_x_axis = function() {
var x_axis;
x_axis = d3.svg.axis().scale(this.x_scale).orient("bottom");
return this.svg.append("g").attr("class", "x axis").attr("transform", "translate(0," + this.plot_height + ")").call(x_axis);
};
Histogram.prototype.add_y_axis = function() {
var yAxis;
yAxis = d3.svg.axis().scale(this.y_scale).orient("left").ticks(5);
return this.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");
};
Histogram.prototype.add_bars = function() {
var bar, rect_width;
bar = this.svg.selectAll(".bar").data(this.histogram_data).enter().append("g").attr("class", "bar").attr("transform", (function(_this) {
return function(d) {
return "translate(" + _this.x_scale(d.x) + "," + _this.y_scale(d.y) + ")";
};
})(this));
rect_width = this.x_scale(this.histogram_data[0].x + this.histogram_data[0].dx) - this.x_scale(this.histogram_data[0].x);
bar.append("rect").attr("x", 1).attr("width", rect_width - 1).attr("height", (function(_this) {
return function(d) {
return _this.plot_height - _this.y_scale(d.y);
};
})(this));
return bar.append("text").attr("dy", ".75em").attr("y", 6).attr("x", rect_width / 2).attr("text-anchor", "middle").style("fill", "#fff").text((function(_this) {
return function(d) {
var bar_height;
bar_height = _this.plot_height - _this.y_scale(d.y);
if (bar_height > 20) {
return _this.format_count(d.y);
}
};
})(this));
};
return Histogram;
})();
root.Histogram = Histogram;
}).call(this);
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