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1892 lines (1671 loc) · 47.1 KB
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(function(){d3.layout = {};
// Implements hierarchical edge bundling using Holten's algorithm. For each
// input link, a path is computed that travels through the tree, up the parent
// hierarchy to the least common ancestor, and then back down to the destination
// node. Each path is simply an array of nodes.
d3.layout.bundle = function() {
return function(links) {
var paths = [],
i = -1,
n = links.length;
while (++i < n) paths.push(d3_layout_bundlePath(links[i]));
return paths;
};
};
function d3_layout_bundlePath(link) {
var start = link.source,
end = link.target,
lca = d3_layout_bundleLeastCommonAncestor(start, end),
points = [start];
while (start !== lca) {
start = start.parent;
points.push(start);
}
var k = points.length;
while (end !== lca) {
points.splice(k, 0, end);
end = end.parent;
}
return points;
}
function d3_layout_bundleAncestors(node) {
var ancestors = [],
parent = node.parent;
while (parent != null) {
ancestors.push(node);
node = parent;
parent = parent.parent;
}
ancestors.push(node);
return ancestors;
}
function d3_layout_bundleLeastCommonAncestor(a, b) {
if (a === b) return a;
var aNodes = d3_layout_bundleAncestors(a),
bNodes = d3_layout_bundleAncestors(b),
aNode = aNodes.pop(),
bNode = bNodes.pop(),
sharedNode = null;
while (aNode === bNode) {
sharedNode = aNode;
aNode = aNodes.pop();
bNode = bNodes.pop();
}
return sharedNode;
}
d3.layout.chord = function() {
var chord = {},
chords,
groups,
matrix,
n,
padding = 0,
sortGroups,
sortSubgroups,
sortChords;
function relayout() {
var subgroups = {},
groupSums = [],
groupIndex = d3.range(n),
subgroupIndex = [],
k,
x,
x0,
i,
j;
chords = [];
groups = [];
// Compute the sum.
k = 0, i = -1; while (++i < n) {
x = 0, j = -1; while (++j < n) {
x += matrix[i][j];
}
groupSums.push(x);
subgroupIndex.push(d3.range(n));
k += x;
}
// Sort groups…
if (sortGroups) {
groupIndex.sort(function(a, b) {
return sortGroups(groupSums[a], groupSums[b]);
});
}
// Sort subgroups…
if (sortSubgroups) {
subgroupIndex.forEach(function(d, i) {
d.sort(function(a, b) {
return sortSubgroups(matrix[i][a], matrix[i][b]);
});
});
}
// Convert the sum to scaling factor for [0, 2pi].
// TODO Allow start and end angle to be specified.
// TODO Allow padding to be specified as percentage?
k = (2 * Math.PI - padding * n) / k;
// Compute the start and end angle for each group and subgroup.
x = 0, i = -1; while (++i < n) {
x0 = x, j = -1; while (++j < n) {
var di = groupIndex[i],
dj = subgroupIndex[di][j],
v = matrix[di][dj];
subgroups[di + "-" + dj] = {
index: di,
subindex: dj,
startAngle: x,
endAngle: x += v * k,
value: v
};
}
groups.push({
index: di,
startAngle: x0,
endAngle: x,
value: (x - x0) / k
});
x += padding;
}
// Generate chords for each (non-empty) subgroup-subgroup link.
i = -1; while (++i < n) {
j = i - 1; while (++j < n) {
var source = subgroups[i + "-" + j],
target = subgroups[j + "-" + i];
if (source.value || target.value) {
chords.push(source.value < target.value
? {source: target, target: source}
: {source: source, target: target});
}
}
}
if (sortChords) resort();
}
function resort() {
chords.sort(function(a, b) {
return sortChords(
(a.source.value + a.target.value) / 2,
(b.source.value + b.target.value) / 2);
});
}
chord.matrix = function(x) {
if (!arguments.length) return matrix;
n = (matrix = x) && matrix.length;
chords = groups = null;
return chord;
};
chord.padding = function(x) {
if (!arguments.length) return padding;
padding = x;
chords = groups = null;
return chord;
};
chord.sortGroups = function(x) {
if (!arguments.length) return sortGroups;
sortGroups = x;
chords = groups = null;
return chord;
};
chord.sortSubgroups = function(x) {
if (!arguments.length) return sortSubgroups;
sortSubgroups = x;
chords = null;
return chord;
};
chord.sortChords = function(x) {
if (!arguments.length) return sortChords;
sortChords = x;
if (chords) resort();
return chord;
};
chord.chords = function() {
if (!chords) relayout();
return chords;
};
chord.groups = function() {
if (!groups) relayout();
return groups;
};
return chord;
};
// A rudimentary force layout using Gauss-Seidel.
d3.layout.force = function() {
var force = {},
event = d3.dispatch("tick"),
size = [1, 1],
drag,
alpha,
friction = .9,
linkDistance = d3_layout_forceLinkDistance,
linkStrength = d3_layout_forceLinkStrength,
charge = -30,
gravity = .1,
theta = .8,
interval,
nodes = [],
links = [],
distances,
strengths,
charges;
function repulse(node) {
return function(quad, x1, y1, x2, y2) {
if (quad.point !== node) {
var dx = quad.cx - node.x,
dy = quad.cy - node.y,
dn = 1 / Math.sqrt(dx * dx + dy * dy);
/* Barnes-Hut criterion. */
if ((x2 - x1) * dn < theta) {
var k = quad.charge * dn * dn;
node.px -= dx * k;
node.py -= dy * k;
return true;
}
if (quad.point && isFinite(dn)) {
var k = quad.pointCharge * dn * dn;
node.px -= dx * k;
node.py -= dy * k;
}
}
return !quad.charge;
};
}
function tick() {
var n = nodes.length,
m = links.length,
q,
i, // current index
o, // current object
s, // current source
t, // current target
l, // current distance
k, // current force
x, // x-distance
y; // y-distance
// gauss-seidel relaxation for links
for (i = 0; i < m; ++i) {
o = links[i];
s = o.source;
t = o.target;
x = t.x - s.x;
y = t.y - s.y;
if (l = (x * x + y * y)) {
l = alpha * strengths[i] * ((l = Math.sqrt(l)) - distances[i]) / l;
x *= l;
y *= l;
t.x -= x * (k = s.weight / (t.weight + s.weight));
t.y -= y * k;
s.x += x * (k = 1 - k);
s.y += y * k;
}
}
// apply gravity forces
if (k = alpha * gravity) {
x = size[0] / 2;
y = size[1] / 2;
i = -1; if (k) while (++i < n) {
o = nodes[i];
o.x += (x - o.x) * k;
o.y += (y - o.y) * k;
}
}
// compute quadtree center of mass and apply charge forces
if (charge) {
d3_layout_forceAccumulate(q = d3.geom.quadtree(nodes), alpha, charges);
i = -1; while (++i < n) {
if (!(o = nodes[i]).fixed) {
q.visit(repulse(o));
}
}
}
// position verlet integration
i = -1; while (++i < n) {
o = nodes[i];
if (o.fixed) {
o.x = o.px;
o.y = o.py;
} else {
o.x -= (o.px - (o.px = o.x)) * friction;
o.y -= (o.py - (o.py = o.y)) * friction;
}
}
event.tick.dispatch({type: "tick", alpha: alpha});
// simulated annealing, basically
return (alpha *= .99) < .005;
}
force.on = function(type, listener) {
event[type].add(listener);
return force;
};
force.nodes = function(x) {
if (!arguments.length) return nodes;
nodes = x;
return force;
};
force.links = function(x) {
if (!arguments.length) return links;
links = x;
return force;
};
force.size = function(x) {
if (!arguments.length) return size;
size = x;
return force;
};
force.linkDistance = function(x) {
if (!arguments.length) return linkDistance;
linkDistance = d3.functor(x);
return force;
};
// For backwards-compatibility.
force.distance = force.linkDistance;
force.linkStrength = function(x) {
if (!arguments.length) return linkStrength;
linkStrength = d3.functor(x);
return force;
};
force.friction = function(x) {
if (!arguments.length) return friction;
friction = x;
return force;
};
force.charge = function(x) {
if (!arguments.length) return charge;
charge = typeof x === "function" ? x : +x;
return force;
};
force.gravity = function(x) {
if (!arguments.length) return gravity;
gravity = x;
return force;
};
force.theta = function(x) {
if (!arguments.length) return theta;
theta = x;
return force;
};
force.start = function() {
var i,
j,
n = nodes.length,
m = links.length,
w = size[0],
h = size[1],
neighbors,
o;
for (i = 0; i < n; ++i) {
(o = nodes[i]).index = i;
o.weight = 0;
}
distances = [];
strengths = [];
for (i = 0; i < m; ++i) {
o = links[i];
if (typeof o.source == "number") o.source = nodes[o.source];
if (typeof o.target == "number") o.target = nodes[o.target];
distances[i] = linkDistance.call(this, o, i);
strengths[i] = linkStrength.call(this, o, i);
++o.source.weight;
++o.target.weight;
}
for (i = 0; i < n; ++i) {
o = nodes[i];
if (isNaN(o.x)) o.x = position("x", w);
if (isNaN(o.y)) o.y = position("y", h);
if (isNaN(o.px)) o.px = o.x;
if (isNaN(o.py)) o.py = o.y;
}
charges = [];
if (typeof charge === "function") {
for (i = 0; i < n; ++i) {
charges[i] = +charge.call(this, nodes[i], i);
}
} else {
for (i = 0; i < n; ++i) {
charges[i] = charge;
}
}
// initialize node position based on first neighbor
function position(dimension, size) {
var neighbors = neighbor(i),
j = -1,
m = neighbors.length,
x;
while (++j < m) if (!isNaN(x = neighbors[j][dimension])) return x;
return Math.random() * size;
}
// initialize neighbors lazily
function neighbor() {
if (!neighbors) {
neighbors = [];
for (j = 0; j < n; ++j) {
neighbors[j] = [];
}
for (j = 0; j < m; ++j) {
var o = links[j];
neighbors[o.source.index].push(o.target);
neighbors[o.target.index].push(o.source);
}
}
return neighbors[i];
}
return force.resume();
};
force.resume = function() {
alpha = .1;
d3.timer(tick);
return force;
};
force.stop = function() {
alpha = 0;
return force;
};
// use `node.call(force.drag)` to make nodes draggable
force.drag = function() {
if (!drag) drag = d3.behavior.drag()
.on("dragstart", dragstart)
.on("drag", d3_layout_forceDrag)
.on("dragend", d3_layout_forceDragEnd);
this.on("mouseover.force", d3_layout_forceDragOver)
.on("mouseout.force", d3_layout_forceDragOut)
.call(drag);
};
function dragstart(d) {
d3_layout_forceDragOver(d3_layout_forceDragNode = d);
d3_layout_forceDragForce = force;
}
return force;
};
var d3_layout_forceDragForce,
d3_layout_forceDragNode;
function d3_layout_forceDragOver(d) {
d.fixed |= 2;
}
function d3_layout_forceDragOut(d) {
if (d !== d3_layout_forceDragNode) d.fixed &= 1;
}
function d3_layout_forceDragEnd() {
d3_layout_forceDrag();
d3_layout_forceDragNode.fixed &= 1;
d3_layout_forceDragForce = d3_layout_forceDragNode = null;
}
function d3_layout_forceDrag() {
d3_layout_forceDragNode.px += d3.event.dx;
d3_layout_forceDragNode.py += d3.event.dy;
d3_layout_forceDragForce.resume(); // restart annealing
}
function d3_layout_forceAccumulate(quad, alpha, charges) {
var cx = 0,
cy = 0;
quad.charge = 0;
if (!quad.leaf) {
var nodes = quad.nodes,
n = nodes.length,
i = -1,
c;
while (++i < n) {
c = nodes[i];
if (c == null) continue;
d3_layout_forceAccumulate(c, alpha, charges);
quad.charge += c.charge;
cx += c.charge * c.cx;
cy += c.charge * c.cy;
}
}
if (quad.point) {
// jitter internal nodes that are coincident
if (!quad.leaf) {
quad.point.x += Math.random() - .5;
quad.point.y += Math.random() - .5;
}
var k = alpha * charges[quad.point.index];
quad.charge += quad.pointCharge = k;
cx += k * quad.point.x;
cy += k * quad.point.y;
}
quad.cx = cx / quad.charge;
quad.cy = cy / quad.charge;
}
function d3_layout_forceLinkDistance(link) {
return 20;
}
function d3_layout_forceLinkStrength(link) {
return 1;
}
d3.layout.partition = function() {
var hierarchy = d3.layout.hierarchy(),
size = [1, 1]; // width, height
function position(node, x, dx, dy) {
var children = node.children;
node.x = x;
node.y = node.depth * dy;
node.dx = dx;
node.dy = dy;
if (children && (n = children.length)) {
var i = -1,
n,
c,
d;
dx = node.value ? dx / node.value : 0;
while (++i < n) {
position(c = children[i], x, d = c.value * dx, dy);
x += d;
}
}
}
function depth(node) {
var children = node.children,
d = 0;
if (children && (n = children.length)) {
var i = -1,
n;
while (++i < n) d = Math.max(d, depth(children[i]));
}
return 1 + d;
}
function partition(d, i) {
var nodes = hierarchy.call(this, d, i);
position(nodes[0], 0, size[0], size[1] / depth(nodes[0]));
return nodes;
}
partition.size = function(x) {
if (!arguments.length) return size;
size = x;
return partition;
};
return d3_layout_hierarchyRebind(partition, hierarchy);
};
d3.layout.pie = function() {
var value = Number,
sort = null,
startAngle = 0,
endAngle = 2 * Math.PI;
function pie(data, i) {
// Compute the start angle.
var a = +(typeof startAngle === "function"
? startAngle.apply(this, arguments)
: startAngle);
// Compute the angular range (end - start).
var k = (typeof endAngle === "function"
? endAngle.apply(this, arguments)
: endAngle) - startAngle;
// Optionally sort the data.
var index = d3.range(data.length);
if (sort != null) index.sort(function(i, j) {
return sort(data[i], data[j]);
});
// Compute the numeric values for each data element.
var values = data.map(value);
// Convert k into a scale factor from value to angle, using the sum.
k /= values.reduce(function(p, d) { return p + d; }, 0);
// Compute the arcs!
var arcs = index.map(function(i) {
return {
data: data[i],
value: d = values[i],
startAngle: a,
endAngle: a += d * k
};
});
// Return the arcs in the original data's order.
return data.map(function(d, i) {
return arcs[index[i]];
});
}
/**
* Specifies the value function *x*, which returns a nonnegative numeric value
* for each datum. The default value function is `Number`. The value function
* is passed two arguments: the current datum and the current index.
*/
pie.value = function(x) {
if (!arguments.length) return value;
value = x;
return pie;
};
/**
* Specifies a sort comparison operator *x*. The comparator is passed two data
* elements from the data array, a and b; it returns a negative value if a is
* less than b, a positive value if a is greater than b, and zero if a equals
* b.
*/
pie.sort = function(x) {
if (!arguments.length) return sort;
sort = x;
return pie;
};
/**
* Specifies the overall start angle of the pie chart. Defaults to 0. The
* start angle can be specified either as a constant or as a function; in the
* case of a function, it is evaluated once per array (as opposed to per
* element).
*/
pie.startAngle = function(x) {
if (!arguments.length) return startAngle;
startAngle = x;
return pie;
};
/**
* Specifies the overall end angle of the pie chart. Defaults to 2π. The
* end angle can be specified either as a constant or as a function; in the
* case of a function, it is evaluated once per array (as opposed to per
* element).
*/
pie.endAngle = function(x) {
if (!arguments.length) return endAngle;
endAngle = x;
return pie;
};
return pie;
};
// data is two-dimensional array of x,y; we populate y0
d3.layout.stack = function() {
var values = Object,
order = d3_layout_stackOrders["default"],
offset = d3_layout_stackOffsets["zero"],
out = d3_layout_stackOut,
x = d3_layout_stackX,
y = d3_layout_stackY;
function stack(data, index) {
// Convert series to canonical two-dimensional representation.
var series = data.map(function(d, i) {
return values.call(stack, d, i);
});
// Convert each series to canonical [[x,y]] representation.
var points = series.map(function(d, i) {
return d.map(function(v, i) {
return [x.call(stack, v, i), y.call(stack, v, i)];
});
});
// Compute the order of series, and permute them.
var orders = order.call(stack, points, index);
series = d3.permute(series, orders);
points = d3.permute(points, orders);
// Compute the baseline…
var offsets = offset.call(stack, points, index);
// And propagate it to other series.
var n = series.length,
m = series[0].length,
i,
j,
o;
for (j = 0; j < m; ++j) {
out.call(stack, series[0][j], o = offsets[j], points[0][j][1]);
for (i = 1; i < n; ++i) {
out.call(stack, series[i][j], o += points[i - 1][j][1], points[i][j][1]);
}
}
return data;
}
stack.values = function(x) {
if (!arguments.length) return values;
values = x;
return stack;
};
stack.order = function(x) {
if (!arguments.length) return order;
order = typeof x === "function" ? x : d3_layout_stackOrders[x];
return stack;
};
stack.offset = function(x) {
if (!arguments.length) return offset;
offset = typeof x === "function" ? x : d3_layout_stackOffsets[x];
return stack;
};
stack.x = function(z) {
if (!arguments.length) return x;
x = z;
return stack;
};
stack.y = function(z) {
if (!arguments.length) return y;
y = z;
return stack;
};
stack.out = function(z) {
if (!arguments.length) return out;
out = z;
return stack;
};
return stack;
}
function d3_layout_stackX(d) {
return d.x;
}
function d3_layout_stackY(d) {
return d.y;
}
function d3_layout_stackOut(d, y0, y) {
d.y0 = y0;
d.y = y;
}
var d3_layout_stackOrders = {
"inside-out": function(data) {
var n = data.length,
i,
j,
max = data.map(d3_layout_stackMaxIndex),
sums = data.map(d3_layout_stackReduceSum),
index = d3.range(n).sort(function(a, b) { return max[a] - max[b]; }),
top = 0,
bottom = 0,
tops = [],
bottoms = [];
for (i = 0; i < n; ++i) {
j = index[i];
if (top < bottom) {
top += sums[j];
tops.push(j);
} else {
bottom += sums[j];
bottoms.push(j);
}
}
return bottoms.reverse().concat(tops);
},
"reverse": function(data) {
return d3.range(data.length).reverse();
},
"default": function(data) {
return d3.range(data.length);
}
};
var d3_layout_stackOffsets = {
"silhouette": function(data) {
var n = data.length,
m = data[0].length,
sums = [],
max = 0,
i,
j,
o,
y0 = [];
for (j = 0; j < m; ++j) {
for (i = 0, o = 0; i < n; i++) o += data[i][j][1];
if (o > max) max = o;
sums.push(o);
}
for (j = 0; j < m; ++j) {
y0[j] = (max - sums[j]) / 2;
}
return y0;
},
"wiggle": function(data) {
var n = data.length,
x = data[0],
m = x.length,
max = 0,
i,
j,
k,
s1,
s2,
s3,
dx,
o,
o0,
y0 = [];
y0[0] = o = o0 = 0;
for (j = 1; j < m; ++j) {
for (i = 0, s1 = 0; i < n; ++i) s1 += data[i][j][1];
for (i = 0, s2 = 0, dx = x[j][0] - x[j - 1][0]; i < n; ++i) {
for (k = 0, s3 = (data[i][j][1] - data[i][j - 1][1]) / (2 * dx); k < i; ++k) {
s3 += (data[k][j][1] - data[k][j - 1][1]) / dx;
}
s2 += s3 * data[i][j][1];
}
y0[j] = o -= s1 ? s2 / s1 * dx : 0;
if (o < o0) o0 = o;
}
for (j = 0; j < m; ++j) y0[j] -= o0;
return y0;
},
"expand": function(data) {
var n = data.length,
m = data[0].length,
k = 1 / n,
i,
j,
o,
y0 = [];
for (j = 0; j < m; ++j) {
for (i = 0, o = 0; i < n; i++) o += data[i][j][1];
if (o) for (i = 0; i < n; i++) data[i][j][1] /= o;
else for (i = 0; i < n; i++) data[i][j][1] = k;
}
for (j = 0; j < m; ++j) y0[j] = 0;
return y0;
},
"zero": function(data) {
var j = -1,
m = data[0].length,
y0 = [];
while (++j < m) y0[j] = 0;
return y0;
}
};
function d3_layout_stackMaxIndex(array) {
var i = 1,
j = 0,
v = array[0][1],
k,
n = array.length;
for (; i < n; ++i) {
if ((k = array[i][1]) > v) {
j = i;
v = k;
}
}
return j;
}
function d3_layout_stackReduceSum(d) {
return d.reduce(d3_layout_stackSum, 0);
}
function d3_layout_stackSum(p, d) {
return p + d[1];
}
d3.layout.histogram = function() {
var frequency = true,
valuer = Number,
ranger = d3_layout_histogramRange,
binner = d3_layout_histogramBinSturges;
function histogram(data, i) {
var bins = [],
values = data.map(valuer, this),
range = ranger.call(this, values, i),
thresholds = binner.call(this, range, values, i),
bin,
i = -1,
n = values.length,
m = thresholds.length - 1,
k = frequency ? 1 : 1 / n,
x;
// Initialize the bins.
while (++i < m) {
bin = bins[i] = [];
bin.dx = thresholds[i + 1] - (bin.x = thresholds[i]);
bin.y = 0;
}
// Fill the bins, ignoring values outside the range.
i = -1; while(++i < n) {
x = values[i];
if ((x >= range[0]) && (x <= range[1])) {
bin = bins[d3.bisect(thresholds, x, 1, m) - 1];
bin.y += k;
bin.push(data[i]);
}
}
return bins;
}
// Specifies how to extract a value from the associated data. The default
// value function is `Number`, which is equivalent to the identity function.
histogram.value = function(x) {
if (!arguments.length) return valuer;
valuer = x;
return histogram;
};
// Specifies the range of the histogram. Values outside the specified range
// will be ignored. The argument `x` may be specified either as a two-element
// array representing the minimum and maximum value of the range, or as a
// function that returns the range given the array of values and the current
// index `i`. The default range is the extent (minimum and maximum) of the
// values.
histogram.range = function(x) {
if (!arguments.length) return ranger;
ranger = d3.functor(x);
return histogram;
};
// Specifies how to bin values in the histogram. The argument `x` may be
// specified as a number, in which case the range of values will be split
// uniformly into the given number of bins. Or, `x` may be an array of
// threshold values, defining the bins; the specified array must contain the
// rightmost (upper) value, thus specifying n + 1 values for n bins. Or, `x`
// may be a function which is evaluated, being passed the range, the array of
// values, and the current index `i`, returning an array of thresholds. The
// default bin function will divide the values into uniform bins using