d3-box.v4.js // 原始代码参考了这两处// 1. https://bl.ocks.org/mbostock/4061502// 2. http://bl.ocks.org/jensgrubert/7789216(function () { // Inspired by http://informationandvisualization.de/blog/box-plot d3.box = function () { var
// 原始代码参考了这两处
// 1. https://bl.ocks.org/mbostock/4061502
// 2. http://bl.ocks.org/jensgrubert/7789216
(function () {
// Inspired by http://informationandvisualization.de/blog/box-plot
d3.box = function () {
var width = 1,
height = 1,
duration = 0,
domain = null,
value = Number,
whiskers = boxWhiskers,
quartiles = boxQuartiles,
showLabels = true,
tickFormat = null;
// For each small multiple…
function box(g) {
g.each(function (d, i) {
d = d.map(value).sort(d3.ascending);
var g = d3.select(this),
n = d.length,
min = d[0],
max = d[n - 1];
// Compute quartiles. Must return exactly 3 elements.
var quartileData = d.quartiles = quartiles(d);
// Compute whiskers. Must return exactly 2 elements, or null.
var whiskerIndices = whiskers && whiskers.call(this, d, i),
whiskerData = whiskerIndices && whiskerIndices.map(function (i) { return d[i]; });
// Compute outliers. If no whiskers are specified, all data are "outliers".
// We compute the outliers as indices, so that we can join across transitions!
var outlierIndices = whiskerIndices
? d3.range(0, whiskerIndices[0]).concat(d3.range(whiskerIndices[1] + 1, n))
: d3.range(n);
// Compute the new x-scale.
// var x1 = d3.scale.linear()
var x1 = d3.scaleLinear()
.domain(domain && domain.call(this, d, i) || [min, max])
.range([height, 0]);
// Retrieve the old x-scale, if this is an update.
// var x0 = this.__chart__ || d3.scale.linear()
var x0 = this.__chart__ || d3.scaleLinear()
.domain([0, Infinity])
.range(x1.range());
// Stash the new scale.
this.__chart__ = x1;
// Note: the box, median, and box tick elements are fixed in number,
// so we only have to handle enter and update. In contrast, the outliers
// and other elements are variable, so we need to exit them! Variable
// elements also fade in and out.
// Update center line: the vertical line spanning the whiskers.
var center = g.selectAll("line.center")
.data(whiskerData ? [whiskerData] : []);
center.enter().insert("line", "rect")
.attr("class", "center")
.attr("x1", width / 2)
.attr("y1", function (d) { return x0(d[0]); })
.attr("x2", width / 2)
.attr("y2", function (d) { return x0(d[1]); })
.style("opacity", 1e-6)
.transition()
.duration(duration)
.style("opacity", 1)
.attr("y1", function (d) { return x1(d[0]); })
.attr("y2", function (d) { return x1(d[1]); });
center.transition()
.duration(duration)
.style("opacity", 1)
.attr("y1", function (d) { return x1(d[0]); })
.attr("y2", function (d) { return x1(d[1]); });
center.exit().transition()
.duration(duration)
.style("opacity", 1e-6)
.attr("y1", function (d) { return x1(d[0]); })
.attr("y2", function (d) { return x1(d[1]); })
.remove();
// Update innerquartile box.
var box = g.selectAll("rect.box")
.data([quartileData]);
box.enter().append("rect")
.attr("class", "box")
.attr("x", 0)
.attr("y", function (d) { return x0(d[2]); })
.attr("width", width)
.attr("height", function (d) { return x0(d[0]) - x0(d[2]); })
.transition()
.duration(duration)
.attr("y", function (d) { return x1(d[2]); })
.attr("height", function (d) { return x1(d[0]) - x1(d[2]); });
box.transition()
.duration(duration)
.attr("y", function (d) { return x1(d[2]); })
.attr("height", function (d) { return x1(d[0]) - x1(d[2]); });
// Update median line.
var medianLine = g.selectAll("line.median")
.data([quartileData[1]]);
medianLine.enter().append("line")
.attr("class", "median")
.attr("x1", 0)
.attr("y1", x0)
.attr("x2", width)
.attr("y2", x0)
.transition()
.duration(duration)
.attr("y1", x1)
.attr("y2", x1);
medianLine.transition()
.duration(duration)
.attr("y1", x1)
.attr("y2", x1);
// Update whiskers.
var whisker = g.selectAll("line.whisker")
.data(whiskerData || []);
whisker.enter().insert("line", "circle, text")
.attr("class", "whisker")
.attr("x1", 0)
.attr("y1", x0)
.attr("x2", width)
.attr("y2", x0)
.style("opacity", 1e-6)
.transition()
.duration(duration)
.attr("y1", x1)
.attr("y2", x1)
.style("opacity", 1);
whisker.transition()
.duration(duration)
.attr("y1", x1)
.attr("y2", x1)
.style("opacity", 1);
whisker.exit().transition()
.duration(duration)
.attr("y1", x1)
.attr("y2", x1)
.style("opacity", 1e-6)
.remove();
// Update outliers.
var outlier = g.selectAll("circle.outlier")
.data(outlierIndices, Number);
outlier.enter().insert("circle", "text")
.attr("class", "outlier")
.attr("r", 5)
.attr("cx", width / 2)
.attr("cy", function (i) { return x0(d[i]); })
.style("opacity", 1e-6)
.transition()
.duration(duration)
.attr("cy", function (i) { return x1(d[i]); })
.style("opacity", 1);
outlier.transition()
.duration(duration)
.attr("cy", function (i) { return x1(d[i]); })
.style("opacity", 1);
outlier.exit().transition()
.duration(duration)
.attr("cy", function (i) { return x1(d[i]); })
.style("opacity", 1e-6)
.remove();
if (showLabels == true) {
// Compute the tick format.
var format = tickFormat || x1.tickFormat(8);
// Update box ticks.
var boxTick = g.selectAll("text.box")
.data(quartileData);
boxTick.enter().append("text")
.attr("class", "box")
.attr("dy", ".3em")
.attr("dx", function (d, i) { return i & 1 ? 6 : -6 })
.attr("x", function (d, i) { return i & 1 ? width : 0 })
.attr("y", x0)
.attr("text-anchor", function (d, i) { return i & 1 ? "start" : "end"; })
.text(format)
.transition()
.duration(duration)
.attr("y", x1);
boxTick.transition()
.duration(duration)
.text(format)
.attr("y", x1);
// Update whisker ticks. These are handled separately from the box
// ticks because they may or may not exist, and we want don't want
// to join box ticks pre-transition with whisker ticks post-.
var whiskerTick = g.selectAll("text.whisker")
.data(whiskerData || []);
whiskerTick.enter().append("text")
.attr("class", "whisker")
.attr("dy", ".3em")
.attr("dx", 6)
.attr("x", width)
.attr("y", x0)
.text(format)
.style("opacity", 1e-6)
.transition()
.duration(duration)
.attr("y", x1)
.style("opacity", 1);
whiskerTick.transition()
.duration(duration)
.text(format)
.attr("y", x1)
.style("opacity", 1);
whiskerTick.exit().transition()
.duration(duration)
.attr("y", x1)
.style("opacity", 1e-6)
.remove();
}
});
// d3.timer.flush();
d3.timerFlush();
}
box.width = function (x) {
if (!arguments.length) return width;
width = x;
return box;
};
box.height = function (x) {
if (!arguments.length) return height;
height = x;
return box;
};
box.tickFormat = function (x) {
if (!arguments.length) return tickFormat;
tickFormat = x;
return box;
};
box.duration = function (x) {
if (!arguments.length) return duration;
duration = x;
return box;
};
box.domain = function (x) {
if (!arguments.length) return domain;
// domain = x == null ? x : d3.functor(x);
domain = x == null ? x : constant(x);
return box;
};
function constant(x) {
return function () {
return x;
};
}
box.value = function (x) {
if (!arguments.length) return value;
value = x;
return box;
};
box.whiskers = function (x) {
if (!arguments.length) return whiskers;
whiskers = x;
return box;
};
box.showLabels = function (x) {
if (!arguments.length) return showLabels;
showLabels = x;
return box;
};
box.quartiles = function (x) {
if (!arguments.length) return quartiles;
quartiles = x;
return box;
};
return box;
};
function boxWhiskers(d) {
return [0, d.length - 1];
}
function boxQuartiles(d) {
return [
d3.quantile(d, .25),
d3.quantile(d, .5),
d3.quantile(d, .75)
];
}
})();