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chromatography.js
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chromatography.js
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(function () {
var Categories, Color, ColorScale, chromato, CSSColors, Ramp, root, type, _ref, _ref2, _ref3;
var __hasProp = Object.prototype.hasOwnProperty, __extends = function(child, parent) { for (var key in parent) { if (__hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor; child.__super__ = parent.prototype; return child; };
root = typeof exports !== 'undefined' && exports !== null ? exports : this;
chromato = (_ref = root.chromato) != null ? _ref : root.chromato = {};
if (typeof module !== 'undefined' && module !== null) module.exports = chromato;
Color = (function() {
function Color(x, y, z, m) {
var me, _ref2;
me = this;
if (!(x != null) && !(y != null) && !(z != null) && !(m != null)) {
x = [255, 0, 255];
}
if (type(x) === 'array' && x.length === 3) {
if (m == null) m = y;
_ref2 = x, x = _ref2[0], y = _ref2[1], z = _ref2[2];
}
if (type(x) === 'string') {
m = 'hex';
} else {
if (m == null) m = 'rgb';
}
if (m === 'rgb') {
me.rgb = [x, y, z];
} else if (m === 'hsl') {
me.rgb = Color.hsl2rgb(x, y, z);
} else if (m === 'hsv') {
me.rgb = Color.hsv2rgb(x, y, z);
} else if (m === 'hex') {
me.rgb = Color.hex2rgb(x);
} else if (m === 'lab') {
me.rgb = Color.lab2rgb(x, y, z);
} else if (m === 'hcl') {
me.rgb = Color.hcl2rgb(x, y, z);
} else if (m === 'hsi') {
me.rgb = Color.hsi2rgb(x, y, z);
}
}
Color.prototype.hex = function() {
return Color.rgb2hex(this.rgb);
};
Color.prototype.toString = function() {
return this.hex();
};
Color.prototype.hsl = function() {
return Color.rgb2hsl(this.rgb);
};
Color.prototype.hsv = function() {
return Color.rgb2hsv(this.rgb);
};
Color.prototype.lab = function() {
return Color.rgb2lab(this.rgb);
};
Color.prototype.hcl = function() {
return Color.rgb2hcl(this.rgb);
};
Color.prototype.hsi = function() {
return Color.rgb2hsi(this.rgb);
};
Color.prototype.interpolate = function(f, col, m) {
var dh, hue, hue0, hue1, lbv, lbv0, lbv1, me, sat, sat0, sat1, xyz0, xyz1;
me = this;
if (m == null) m = 'rgb';
if (type(col) === 'string') col = new Color(col);
if (m === 'hsl' || m === 'hsv' || m === 'hcl' || m === 'hsi') {
if (m === 'hsl') {
xyz0 = me.hsl();
xyz1 = col.hsl();
} else if (m === 'hsv') {
xyz0 = me.hsv();
xyz1 = col.hsv();
} else if (m === 'hcl') {
xyz0 = me.hcl();
xyz1 = col.hcl();
} else if (m === 'hsi') {
xyz0 = me.hsi();
xyz1 = col.hsi();
}
hue0 = xyz0[0], sat0 = xyz0[1], lbv0 = xyz0[2];
hue1 = xyz1[0], sat1 = xyz1[1], lbv1 = xyz1[2];
if (!isNaN(hue0) && !isNaN(hue1)) {
if (hue1 > hue0 && hue1 - hue0 > 180) {
dh = hue1 - (hue0 + 360);
} else if (hue1 < hue0 && hue0 - hue1 > 180) {
dh = hue1 + 360 - hue0;
} else {
dh = hue1 - hue0;
}
hue = hue0 + f * dh;
} else if (!isNaN(hue0)) {
hue = hue0;
if (lbv1 === 1 || lbv1 === 0) sat = sat0;
} else if (!isNaN(hue1)) {
hue = hue1;
if (lbv0 === 1 || lbv0 === 0) sat = sat1;
} else {
hue = void 0;
}
if (sat == null) sat = sat0 + f * (sat1 - sat0);
lbv = lbv0 + f * (lbv1 - lbv0);
return new Color(hue, sat, lbv, m);
} else if (m === 'rgb') {
xyz0 = me.rgb;
xyz1 = col.rgb;
return new Color(xyz0[0] + f * (xyz1[0] - xyz0[0]), xyz0[1] + f * (xyz1[1] - xyz0[1]), xyz0[2] + f * (xyz1[2] - xyz0[2]), m);
} else if (m === 'lab') {
xyz0 = me.lab();
xyz1 = col.lab();
return new Color(xyz0[0] + f * (xyz1[0] - xyz0[0]), xyz0[1] + f * (xyz1[1] - xyz0[1]), xyz0[2] + f * (xyz1[2] - xyz0[2]), m);
} else {
throw m + ' is not supported as a color mode';
}
};
return Color;
})();
Color.hex2rgb = function(hex) {
var b, g, r, u;
if (!hex.match(/^#?([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})$/)) {
if ((chromato.colors != null) && chromato.colors[hex]) {
hex = chromato.colors[hex];
} else {
throw 'This color format is unknown: ' + hex;
}
}
if (hex.length === 4 || hex.length === 7) hex = hex.substr(1);
if (hex.length === 3) {
hex = hex[0] + hex[0] + hex[1] + hex[1] + hex[2] + hex[2];
}
u = parseInt(hex, 16);
r = u >> 16;
g = u >> 8 & 0xFF;
b = u & 0xFF;
return [r, g, b];
};
Color.rgb2hex = function(r, g, b) {
var str, u, _ref2;
if (r !== void 0 && r.length === 3) {
_ref2 = r, r = _ref2[0], g = _ref2[1], b = _ref2[2];
}
u = r << 16 | g << 8 | b;
str = '000000' + u.toString(16).toUpperCase();
return '#' + str.substr(str.length - 6);
};
Color.hsv2rgb = function(h, s, v) {
var b, f, g, i, l, p, q, r, t, _ref2, _ref3, _ref4, _ref5, _ref6, _ref7, _ref8;
if (type(h) === 'array' && h.length === 3) {
_ref2 = h, h = _ref2[0], s = _ref2[1], l = _ref2[2];
}
v *= 255;
if (s === 0 && isNaN(h)) {
r = g = b = v;
} else {
if (h === 360) h = 0;
if (h > 360) h -= 360;
if (h < 0) h += 360;
h /= 60;
i = Math.floor(h);
f = h - i;
p = v * (1 - s);
q = v * (1 - s * f);
t = v * (1 - s * (1 - f));
switch (i) {
case 0:
_ref3 = [v, t, p], r = _ref3[0], g = _ref3[1], b = _ref3[2];
break;
case 1:
_ref4 = [q, v, p], r = _ref4[0], g = _ref4[1], b = _ref4[2];
break;
case 2:
_ref5 = [p, v, t], r = _ref5[0], g = _ref5[1], b = _ref5[2];
break;
case 3:
_ref6 = [p, q, v], r = _ref6[0], g = _ref6[1], b = _ref6[2];
break;
case 4:
_ref7 = [t, p, v], r = _ref7[0], g = _ref7[1], b = _ref7[2];
break;
case 5:
_ref8 = [v, p, q], r = _ref8[0], g = _ref8[1], b = _ref8[2];
}
}
r = Math.round(r);
g = Math.round(g);
b = Math.round(b);
return [r, g, b];
};
Color.rgb2hsv = function(r, g, b) {
var delta, h, max, min, s, v, _ref2;
if (r !== void 0 && r.length === 3) {
_ref2 = r, r = _ref2[0], g = _ref2[1], b = _ref2[2];
}
min = Math.min(r, g, b);
max = Math.max(r, g, b);
delta = max - min;
v = max / 255.0;
s = delta / max;
if (s === 0) {
h = void 0;
s = 0;
} else {
if (r === max) h = (g - b) / delta;
if (g === max) h = 2 + (b - r) / delta;
if (b === max) h = 4 + (r - g) / delta;
h *= 60;
if (h < 0) h += 360;
}
return [h, s, v];
};
Color.hsl2rgb = function(h, s, l) {
var b, c, g, i, r, t1, t2, t3, _ref2, _ref3;
if (h !== void 0 && h.length === 3) {
_ref2 = h, h = _ref2[0], s = _ref2[1], l = _ref2[2];
}
if (s === 0) {
r = g = b = l * 255;
} else {
t3 = [0, 0, 0];
c = [0, 0, 0];
t2 = l < 0.5 ? l * (1 + s) : l + s - l * s;
t1 = 2 * l - t2;
h /= 360;
t3[0] = h + 1 / 3;
t3[1] = h;
t3[2] = h - 1 / 3;
for (i = 0; i <= 2; i++) {
if (t3[i] < 0) t3[i] += 1;
if (t3[i] > 1) t3[i] -= 1;
if (6 * t3[i] < 1) {
c[i] = t1 + (t2 - t1) * 6 * t3[i];
} else if (2 * t3[i] < 1) {
c[i] = t2;
} else if (3 * t3[i] < 2) {
c[i] = t1 + (t2 - t1) * ((2 / 3) - t3[i]) * 6;
} else {
c[i] = t1;
}
}
_ref3 = [Math.round(c[0] * 255), Math.round(c[1] * 255), Math.round(c[2] * 255)], r = _ref3[0], g = _ref3[1], b = _ref3[2];
}
return [r, g, b];
};
Color.rgb2hsl = function(r, g, b) {
var h, l, max, min, s, _ref2;
if (r !== void 0 && r.length === 3) {
_ref2 = r, r = _ref2[0], g = _ref2[1], b = _ref2[2];
}
r /= 255;
g /= 255;
b /= 255;
min = Math.min(r, g, b);
max = Math.max(r, g, b);
l = (max + min) / 2;
if (max === min) {
s = 0;
h = void 0;
} else {
s = l < 0.5 ? (max - min) / (max + min) : (max - min) / (2 - max - min);
}
if (r === max) {
h = (g - b) / (max - min);
} else if (g === max) {
h = 2 + (b - r) / (max - min);
} else if (b === max) {
h = 4 + (r - g) / (max - min);
}
h *= 60;
if (h < 0) h += 360;
return [h, s, l];
};
Color.lab2xyz = function(l, a, b) {
var finv, ill, sl, x, y, z, _ref2;
if (type(l) === 'array' && l.length === 3) {
_ref2 = l, l = _ref2[0], a = _ref2[1], b = _ref2[2];
}
finv = function(t) {
if (t > (6.0 / 29.0)) {
return t * t * t;
} else {
return 3 * (6.0 / 29.0) * (6.0 / 29.0) * (t - 4.0 / 29.0);
}
};
sl = (l + 0.16) / 1.16;
ill = [0.96421, 1.00000, 0.82519];
y = ill[1] * finv(sl);
x = ill[0] * finv(sl + (a / 5.0));
z = ill[2] * finv(sl - (b / 2.0));
return [x, y, z];
};
Color.xyz2rgb = function(x, y, z) {
var b, bl, clip, correct, g, gl, r, rl, _ref2, _ref3;
if (type(x) === 'array' && x.length === 3) {
_ref2 = x, x = _ref2[0], y = _ref2[1], z = _ref2[2];
}
rl = 3.2406 * x - 1.5372 * y - 0.4986 * z;
gl = -0.9689 * x + 1.8758 * y + 0.0415 * z;
bl = 0.0557 * x - 0.2040 * y + 1.0570 * z;
clip = Math.min(rl, gl, bl) < -0.001 || Math.max(rl, gl, bl) > 1.001;
if (clip) {
rl = rl < 0.0 ? 0.0 : rl > 1.0 ? 1.0 : rl;
gl = gl < 0.0 ? 0.0 : gl > 1.0 ? 1.0 : gl;
bl = bl < 0.0 ? 0.0 : bl > 1.0 ? 1.0 : bl;
}
if (clip) {
_ref3 = [void 0, void 0, void 0], rl = _ref3[0], gl = _ref3[1], bl = _ref3[2];
}
correct = function(cl) {
var a;
a = 0.055;
if (cl <= 0.0031308) {
return 12.92 * cl;
} else {
return (1 + a) * Math.pow(cl, 1 / 2.4) - a;
}
};
r = Math.round(255.0 * correct(rl));
g = Math.round(255.0 * correct(gl));
b = Math.round(255.0 * correct(bl));
return [r, g, b];
};
Color.lab2rgb = function(l, a, b) {
var x, y, z, _ref2, _ref3, _ref4;
if (l !== void 0 && l.length === 3) {
_ref2 = l, l = _ref2[0], a = _ref2[1], b = _ref2[2];
}
if (l !== void 0 && l.length === 3) {
_ref3 = l, l = _ref3[0], a = _ref3[1], b = _ref3[2];
}
_ref4 = Color.lab2xyz(l, a, b), x = _ref4[0], y = _ref4[1], z = _ref4[2];
return Color.xyz2rgb(x, y, z);
};
Color.hcl2lab = function(c, s, l) {
var L, tau_const, a, angle, b, r, _ref2;
if (type(c) === 'array' && c.length === 3) {
_ref2 = c, c = _ref2[0], s = _ref2[1], l = _ref2[2];
}
c /= 360.0;
tau_const = 6.283185307179586476925287;
L = l * 0.61 + 0.09;
angle = tau_const / 6.0 - c * tau_const;
r = (l * 0.311 + 0.125) * s;
a = Math.sin(angle) * r;
b = Math.cos(angle) * r;
return [L, a, b];
};
Color.hcl2rgb = function(c, s, l) {
var L, a, b, _ref2;
_ref2 = Color.hcl2lab(c, s, l), L = _ref2[0], a = _ref2[1], b = _ref2[2];
return Color.lab2rgb(L, a, b);
};
Color.rgb2xyz = function(r, g, b) {
var bl, correct, gl, rl, x, y, z, _ref2;
if (r !== void 0 && r.length === 3) {
_ref2 = r, r = _ref2[0], g = _ref2[1], b = _ref2[2];
}
correct = function(c) {
var a;
a = 0.055;
if (c <= 0.04045) {
return c / 12.92;
} else {
return Math.pow((c + a) / (1 + a), 2.4);
}
};
rl = correct(r / 255.0);
gl = correct(g / 255.0);
bl = correct(b / 255.0);
x = 0.4124 * rl + 0.3576 * gl + 0.1805 * bl;
y = 0.2126 * rl + 0.7152 * gl + 0.0722 * bl;
z = 0.0193 * rl + 0.1192 * gl + 0.9505 * bl;
return [x, y, z];
};
Color.xyz2lab = function(x, y, z) {
var a, b, f, ill, l, _ref2;
if (x !== void 0 && x.length === 3) {
_ref2 = x, x = _ref2[0], y = _ref2[1], z = _ref2[2];
}
ill = [0.96421, 1.00000, 0.82519];
f = function(t) {
if (t > Math.pow(6.0 / 29.0, 3)) {
return Math.pow(t, 1 / 3);
} else {
return (1 / 3) * (29 / 6) * (29 / 6) * t + 4.0 / 29.0;
}
};
l = 1.16 * f(y / ill[1]) - 0.16;
a = 5 * (f(x / ill[0]) - f(y / ill[1]));
b = 2 * (f(y / ill[1]) - f(z / ill[2]));
return [l, a, b];
};
Color.rgb2lab = function(r, g, b) {
var x, y, z, _ref2, _ref3;
if (r !== void 0 && r.length === 3) {
_ref2 = r, r = _ref2[0], g = _ref2[1], b = _ref2[2];
}
_ref3 = Color.rgb2xyz(r, g, b), x = _ref3[0], y = _ref3[1], z = _ref3[2];
return Color.xyz2lab(x, y, z);
};
Color.lab2hcl = function(l, a, b) {
var L, tau_const, angle, c, r, s, _ref2;
if (type(l) === 'array' && l.length === 3) {
_ref2 = l, l = _ref2[0], a = _ref2[1], b = _ref2[2];
}
L = l;
l = (l - 0.09) / 0.61;
r = Math.sqrt(a * a + b * b);
s = r / (l * 0.311 + 0.125);
tau_const = 6.283185307179586476925287;
angle = Math.atan2(a, b);
c = (tau_const / 6 - angle) / tau_const;
c *= 360;
if (c < 0) c += 360;
return [c, s, l];
};
Color.rgb2hcl = function(r, g, b) {
var a, l, _ref2, _ref3;
if (type(r) === 'array' && r.length === 3) {
_ref2 = r, r = _ref2[0], g = _ref2[1], b = _ref2[2];
}
_ref3 = Color.rgb2lab(r, g, b), l = _ref3[0], a = _ref3[1], b = _ref3[2];
return Color.lab2hcl(l, a, b);
};
Color.rgb2hsi = function(r, g, b) {
var pi_const_x2, h, i, min, s, _ref2;
if (type(r) === 'array' && r.length === 3) {
_ref2 = r, r = _ref2[0], g = _ref2[1], b = _ref2[2];
}
pi_const_x2 = Math.PI * 2;
r /= 255;
g /= 255;
b /= 255;
min = Math.min(r, g, b);
i = (r + g + b) / 3;
s = 1 - min / i;
if (s === 0) {
h = 0;
} else {
h = ((r - g) + (r - b)) / 2;
h /= Math.sqrt((r - g) * (r - g) + (r - b) * (g - b));
h = Math.acos(h);
if (b > g) h = pi_const_x2 - h;
h /= pi_const_x2;
}
return [h * 360, s, i];
};
Color.hsi2rgb = function(h, s, i) {
var pi_const_div3, pi_const_x2, b, cos, g, r, _ref2;
if (type(h) === 'array' && h.length === 3) {
_ref2 = h, h = _ref2[0], s = _ref2[1], i = _ref2[2];
}
pi_const_x2 = Math.PI * 2;
pi_const_div3 = Math.PI / 3;
cos = Math.cos;
if (h < 0) h += 360;
if (h > 360) h -= 360;
h /= 360;
if (h < 1 / 3) {
b = (1 - s) / 3;
r = (1 + s * cos(pi_const_x2 * h) / cos(pi_const_div3 - pi_const_x2 * h)) / 3;
g = 1 - (b + r);
} else if (h < 2 / 3) {
h -= 1 / 3;
r = (1 - s) / 3;
g = (1 + s * cos(pi_const_x2 * h) / cos(pi_const_div3 - pi_const_x2 * h)) / 3;
b = 1 - (r + g);
} else {
h -= 2 / 3;
g = (1 - s) / 3;
b = (1 + s * cos(pi_const_x2 * h) / cos(pi_const_div3 - pi_const_x2 * h)) / 3;
r = 1 - (g + b);
}
r = i * r * 3;
g = i * g * 3;
b = i * b * 3;
return [r * 255, g * 255, b * 255];
};
chromato.Color = Color;
chromato.hsl = function(h, s, l) {
return new Color(h, s, l, 'hsl');
};
chromato.hsv = function(h, s, v) {
return new Color(h, s, v, 'hsv');
};
chromato.rgb = function(r, g, b) {
return new Color(r, g, b, 'rgb');
};
chromato.hex = function(x) {
return new Color(x);
};
chromato.lab = function(l, a, b) {
return new Color(l, a, b, 'lab');
};
chromato.hcl = function(c, s, l) {
return new Color(c, s, l, 'hcl');
};
chromato.hsi = function(h, s, i) {
return new Color(h, s, i, 'hsi');
};
chromato.interpolate = function(a, b, f, m) {
if (type(a) === 'string') a = new Color(a);
if (type(b) === 'string') b = new Color(b);
return a.interpolate(f, b, m);
};
ColorScale = (function() {
function ColorScale(opts) {
var c, col, cols, me, _ref2, _ref3, _ref4, _ref5, _ref6, _ref7;
me = this;
me.colors = cols = (_ref2 = opts.colors) != null ? _ref2 : ['#ddd', '#222'];
for (c = 0, _ref3 = cols.length - 1; 0 <= _ref3 ? c <= _ref3 : c >= _ref3; 0 <= _ref3 ? c++ : c--) {
col = cols[c];
if (type(col) === 'string') cols[c] = new Color(col);
}
if (opts.positions != null) {
me.pos = opts.positions;
} else {
me.pos = [];
for (c = 0, _ref4 = cols.length - 1; 0 <= _ref4 ? c <= _ref4 : c >= _ref4; 0 <= _ref4 ? c++ : c--) {
me.pos.push(c / (cols.length - 1));
}
}
me.mode = (_ref5 = opts.mode) != null ? _ref5 : 'hsv';
me.nacol = (_ref6 = opts.nacol) != null ? _ref6 : '#ccc';
me.setClasses((_ref7 = opts.limits) != null ? _ref7 : [0, 1]);
me;
}
ColorScale.prototype.getColor = function(value) {
var c, f, f0, me;
me = this;
if (isNaN(value)) return me.nacol;
if (me.classLimits.length > 2) {
c = me.getClass(value);
f = c / (me.numClasses - 1);
} else {
f = f0 = (value - me.min) / (me.max - me.min);
f = Math.min(1, Math.max(0, f));
}
return me.fColor(f);
};
ColorScale.prototype.fColor = function(f) {
var col, cols, i, me, p, _ref2;
me = this;
cols = me.colors;
for (i = 0, _ref2 = me.pos.length - 1; 0 <= _ref2 ? i <= _ref2 : i >= _ref2; 0 <= _ref2 ? i++ : i--) {
p = me.pos[i];
if (f <= p) {
col = cols[i];
break;
}
if (f >= p && i === me.pos.length - 1) {
col = cols[i];
break;
}
if (f > p && f < me.pos[i + 1]) {
f = (f - p) / (me.pos[i + 1] - p);
col = chromato.interpolate(cols[i], cols[i + 1], f, me.mode);
break;
}
}
return col;
};
ColorScale.prototype.classifyValue = function(value) {
var i, limits, maxc, minc, n, self;
self = this;
limits = self.classLimits;
if (limits.length > 2) {
n = limits.length - 1;
i = self.getClass(value);
value = limits[i] + (limits[i + 1] - limits[i]) * 0.5;
minc = limits[0];
maxc = limits[n - 1];
value = self.min + ((value - minc) / (maxc - minc)) * (self.max - self.min);
}
return value;
};
ColorScale.prototype.setClasses = function(limits) {
var me;
if (limits == null) limits = [];
me = this;
me.classLimits = limits;
me.min = limits[0];
me.max = limits[limits.length - 1];
if (limits.length === 2) {
return me.numClasses = 0;
} else {
return me.numClasses = limits.length - 1;
}
};
ColorScale.prototype.getClass = function(value) {
var i, limits, n, self;
self = this;
limits = self.classLimits;
if (limits != null) {
n = limits.length - 1;
i = 0;
while (i < n && value >= limits[i]) {
i++;
}
return i - 1;
}
};
ColorScale.prototype.validValue = function(value) {
return !isNaN(value);
};
return ColorScale;
})();
chromato.ColorScale = ColorScale;
Ramp = (function() {
__extends(Ramp, ColorScale);
function Ramp(col0, col1, mode) {
if (col0 == null) col0 = '#fe0000';
if (col1 == null) col1 = '#feeeee';
if (mode == null) mode = 'hsl';
Ramp.__super__.constructor.call(this, [col0, col1], [0, 1], mode);
}
return Ramp;
})();
chromato.Ramp = Ramp;
Categories = (function() {
__extends(Categories, ColorScale);
function Categories(colors) {
var me;
me = this;
me.colors = colors;
}
Categories.prototype.parseData = function(data, data_col) {};
Categories.prototype.getColor = function(value) {
var me;
me = this;
if (me.colors.hasOwnProperty(value)) {
return me.colors[value];
} else {
return '#cccccc';
}
};
Categories.prototype.validValue = function(value) {
return this.colors.hasOwnProperty(value);
};
return Categories;
})();
chromato.Categories = Categories;
CSSColors = (function() {
__extends(CSSColors, ColorScale);
function CSSColors(name) {
var me;
me = this;
me.name = name;
me.setClasses(7);
me;
}
CSSColors.prototype.getColor = function(value) {
var c, me;
me = this;
c = me.getClass(value);
return me.name + ' l' + me.numClasses + ' c' + c;
};
return CSSColors;
})();
chromato.CSSColors = CSSColors;
if ((_ref2 = chromato.scales) == null) chromato.scales = {};
chromato.limits = function(data, mode, num, prop) {
var assignments, best, centroids, cluster, clusterSizes, dist, i, j, k, kClusters, limits, max, min, mindist, n, nb_iters, newCentroids, p, pb, pr, repeat, row, sum, tmpKMeansBreaks, val, value, values, _i, _j, _k, _len, _len2, _len3, _ref10, _ref11, _ref12, _ref13, _ref14, _ref15, _ref16, _ref3, _ref4, _ref5, _ref6, _ref7, _ref8, _ref9;
if (mode == null) mode = 'equal';
if (num == null) num = 7;
if (prop == null) prop = null;
min = Number.MAX_VALUE;
max = Number.MAX_VALUE * -1;
sum = 0;
values = [];
if (type(data) === 'array') {
if (type(data[0]) !== 'object' && type(data[0]) !== 'array') {
for (_i = 0, _len = data.length; _i < _len; _i++) {
val = data[_i];
if (!isNaN(val)) values.push(Number(val));
}
} else {
for (_j = 0, _len2 = data.length; _j < _len2; _j++) {
row = data[_j];
values.push(Number(row[prop]));
}
}
} else if (type(data) === 'object') {
for (k in data) {
val = data[k];
if (type(val) === 'object' && type(prop) === 'string') {
if (!isNaN(val[prop])) values.push(Number(val[prop]));
} else if (type(val) === 'array' && type(prop) === 'number') {
if (!isNaN(val[prop])) values.push(Number(val[prop]));
} else if (type(val) === 'number') {
if (!isNaN(val)) values.push(Number(val));
}
}
}
for (_k = 0, _len3 = values.length; _k < _len3; _k++) {
val = values[_k];
if (!!isNaN(val)) continue;
if (val < min) min = val;
if (val > max) max = val;
sum += val;
}
values = values.sort(function(a, b) {
return a - b;
});
limits = [];
if (mode.substr(0, 1) === 'c') {
limits.push(min);
limits.push(max);
}
if (mode.substr(0, 1) === 'e') {
limits.push(min);
for (i = 1, _ref3 = num - 1; 1 <= _ref3 ? i <= _ref3 : i >= _ref3; 1 <= _ref3 ? i++ : i--) {
limits.push(min + (i / num) * (max - min));
}
limits.push(max);
} else if (mode.substr(0, 1) === 'q') {
limits.push(min);
for (i = 1, _ref4 = num - 1; 1 <= _ref4 ? i <= _ref4 : i >= _ref4; 1 <= _ref4 ? i++ : i--) {
p = values.length * i / num;
pb = Math.floor(p);
if (pb === p) {
limits.push(values[pb]);
} else {
pr = p - pb;
limits.push(values[pb] * pr + values[pb + 1] * (1 - pr));
}
}
limits.push(max);
} else if (mode.substr(0, 1) === 'k') {
n = values.length;
assignments = new Array(n);
clusterSizes = new Array(num);
repeat = true;
nb_iters = 0;
centroids = null;
centroids = [];
centroids.push(min);
for (i = 1, _ref5 = num - 1; 1 <= _ref5 ? i <= _ref5 : i >= _ref5; 1 <= _ref5 ? i++ : i--) {
centroids.push(min + (i / num) * (max - min));
}
centroids.push(max);
while (repeat) {
for (j = 0, _ref6 = num - 1; 0 <= _ref6 ? j <= _ref6 : j >= _ref6; 0 <= _ref6 ? j++ : j--) {
clusterSizes[j] = 0;
}
for (i = 0, _ref7 = n - 1; 0 <= _ref7 ? i <= _ref7 : i >= _ref7; 0 <= _ref7 ? i++ : i--) {
value = values[i];
mindist = Number.MAX_VALUE;
for (j = 0, _ref8 = num - 1; 0 <= _ref8 ? j <= _ref8 : j >= _ref8; 0 <= _ref8 ? j++ : j--) {
dist = Math.abs(centroids[j] - value);
if (dist < mindist) {
mindist = dist;
best = j;
}
}
clusterSizes[best]++;
assignments[i] = best;
}
newCentroids = new Array(num);
for (j = 0, _ref9 = num - 1; 0 <= _ref9 ? j <= _ref9 : j >= _ref9; 0 <= _ref9 ? j++ : j--) {
newCentroids[j] = null;
}
for (i = 0, _ref10 = n - 1; 0 <= _ref10 ? i <= _ref10 : i >= _ref10; 0 <= _ref10 ? i++ : i--) {
cluster = assignments[i];
if (newCentroids[cluster] === null) {
newCentroids[cluster] = values[i];
} else {
newCentroids[cluster] += values[i];
}
}
for (j = 0, _ref11 = num - 1; 0 <= _ref11 ? j <= _ref11 : j >= _ref11; 0 <= _ref11 ? j++ : j--) {
newCentroids[j] *= 1 / clusterSizes[j];
}
repeat = false;
for (j = 0, _ref12 = num - 1; 0 <= _ref12 ? j <= _ref12 : j >= _ref12; 0 <= _ref12 ? j++ : j--) {
if (newCentroids[j] !== centroids[i]) {
repeat = true;
break;
}
}
centroids = newCentroids;
nb_iters++;
if (nb_iters > 200) repeat = false;
}
kClusters = {};
for (j = 0, _ref13 = num - 1; 0 <= _ref13 ? j <= _ref13 : j >= _ref13; 0 <= _ref13 ? j++ : j--) {
kClusters[j] = [];
}
for (i = 0, _ref14 = n - 1; 0 <= _ref14 ? i <= _ref14 : i >= _ref14; 0 <= _ref14 ? i++ : i--) {
cluster = assignments[i];
kClusters[cluster].push(values[i]);
}
tmpKMeansBreaks = [];
for (j = 0, _ref15 = num - 1; 0 <= _ref15 ? j <= _ref15 : j >= _ref15; 0 <= _ref15 ? j++ : j--) {
tmpKMeansBreaks.push(kClusters[j][0]);
tmpKMeansBreaks.push(kClusters[j][kClusters[j].length - 1]);
}
tmpKMeansBreaks = tmpKMeansBreaks.sort(function(a, b) {
return a - b;
});
limits.push(tmpKMeansBreaks[0]);
for (i = 1, _ref16 = tmpKMeansBreaks.length - 1; i <= _ref16; i += 2) {
if (!isNaN(tmpKMeansBreaks[i])) limits.push(tmpKMeansBreaks[i]);
}
}
return limits;
};
root = typeof exports !== 'undefined' && exports !== null ? exports : this;
type = (function() {
var classToType, name, _i, _len, _ref3;
classToType = {};
_ref3 = 'Boolean Number String Function Array Date RegExp Undefined Null'.split(' ');
for (_i = 0, _len = _ref3.length; _i < _len; _i++) {
name = _ref3[_i];
classToType['[object ' + name + ']'] = name.toLowerCase();
}
return function(obj) {
var strType;
strType = Object.prototype.toString.call(obj);
return classToType[strType] || 'object';
};
})();
if ((_ref3 = root.type) == null) root.type = type;
Array.max = function(array) {
return Math.max.apply(Math, array);
};
Array.min = function(array) {
return Math.min.apply(Math, array);
};
}).call(this);
var createPalette = {
generate: function(colorsCount, checkColor, forceMode, quality, ultra_precision){
if(colorsCount === undefined)
colorsCount = 8;
if(checkColor === undefined)
checkColor = function(x){return true;};
if(forceMode === undefined)
forceMode = false;
if(quality === undefined)
quality = 50;
ultra_precision = ultra_precision || false
if(forceMode){
var colors = [];
function checkLab(lab){
var color = chromato.lab(lab[0], lab[1], lab[2]);
return !isNaN(color.rgb[0]) && color.rgb[0] >= 0 && color.rgb[1] >= 0 && color.rgb[2] >= 0 && color.rgb[0] < 256 && color.rgb[1] < 256 && color.rgb[2] < 256 && checkColor(color);
}
var vectors = {};
for(i = 0; i < colorsCount; i++){
var color = [Math.random(), 2 * Math.random() - 1, 2 * Math.random() - 1];
while(!checkLab(color)){
color = [Math.random(), 2 * Math.random() - 1, 2 * Math.random() - 1];
}
colors.push(color);
}
var repulsion = 0.3;
var speed = 0.05;
var steps = quality * 20;
while(steps-- > 0){
for(i = 0; i < colors.length; i++){
vectors[i] = {dl:0, da:0, db:0};
}
for(i = 0; i < colors.length; i++){
var color_a = colors[i];
for(j = 0; j < i; j++){
var color_b = colors[j];
var dl = color_a[0] - color_b[0];
var da = color_a[1] - color_b[1];
var db = color_a[2] - color_b[2];
var d = Math.sqrt(Math.pow(dl, 2) + Math.pow(da, 2) + Math.pow(db, 2));
if(d > 0){
var force = repulsion / Math.pow(d, 2);
vectors[i].dl += dl * force / d;
vectors[i].da += da * force / d;
vectors[i].db += db * force / d;
vectors[j].dl -= dl * force / d;
vectors[j].da -= da * force / d;
vectors[j].db -= db * force / d;
} else {
vectors[j].dl += 0.02 - 0.04 * Math.random();
vectors[j].da += 0.02 - 0.04 * Math.random();
vectors[j].db += 0.02 - 0.04 * Math.random();
}
}
}
for(i = 0; i < colors.length; i++){
var color = colors[i];
var displacement = speed * Math.sqrt(Math.pow(vectors[i].dl, 2) + Math.pow(vectors[i].da, 2) + Math.pow(vectors[i].db, 2));
if(displacement>0){
var ratio = speed * Math.min(0.1, displacement)/displacement;
candidateLab = [color[0] + vectors[i].dl * ratio, color[1] + vectors[i].da * ratio, color[2] + vectors[i].db * ratio];
if(checkLab(candidateLab)){
colors[i] = candidateLab;
}
}
}
}
return colors.map(function(lab){return chromato.lab(lab[0], lab[1], lab[2]);});
} else {
function checkColor2(color){
var lab = color.lab();
var hcl = color.hcl();
return !isNaN(color.rgb[0]) && color.rgb[0] >= 0 && color.rgb[1] >= 0 && color.rgb[2] >= 0 && color.rgb[0]<256 && color.rgb[1]<256 && color.rgb[2]<256 && checkColor(color);
}
var kMeans = [];
for(i = 0; i < colorsCount; i++){
var lab = [Math.random(), 2 * Math.random() - 1, 2 * Math.random() - 1];
while(!checkColor2(chromato.lab(lab))){
lab = [Math.random(), 2 * Math.random() - 1, 2 * Math.random() - 1];
}
kMeans.push(lab);
}
var colorSamples = [];
var samplesClosest = [];
if(ultra_precision){
for(l = 0; l <= 1; l += 0.01){
for(a =- 1; a <= 1; a += 0.05){
for(b =- 1; b <= 1; b += 0.05){
if(checkColor2(chromato.lab(l, a, b))){
colorSamples.push([l, a, b]);
samplesClosest.push(null);
}
}
}
}
} else {
for(l = 0; l <= 1; l += 0.05){
for(a =- 1; a <= 1; a += 0.1){