wassname/random.js
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bug fix

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This commit is contained in:
ericzhang
2013-05-15 18:06:48 +08:00
parent 45c833e67c
commit ad4d7a59ad
1 changed files with 4 additions and 5 deletions
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src/random.js
+4 -5
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@@ -29,13 +29,12 @@
exports.beta = function (v, w, min, max) {
if (v < w) {
return max - (max - min) * _this.beta(w, v);
return max - (max - min) * _this.beta(w, v, min, max);
}
var y1 = _this.gamma(0, 1, v),
y1 = _this.gamma(0, 1, w);
y2 = _this.gamma(0, 1, w);
return min + (max - min) * y1 / (y1 + y2);
};
exports.cauchy = function (a, b) {
@@ -85,7 +84,7 @@
return (_this.chiSquare(v) / v) / (_this.chiSquare(w) / w);
};
exports.gamma(a, b, c) {
exports.gamma = function (a, b, c) {
var A = 1 / sqrt(2 * c - 1),
B = c - log(4),
Q = c + 1 / A,
@@ -216,7 +215,7 @@
return min + (max - min) * random();
};
exports.userSpecified(usf, xMin, xMax, yMin, yMax) {
exports.userSpecified = function (usf, xMin, xMax, yMin, yMax) {
var x,
y,
areaMax = (xMax - xMin) * (yMax - yMin);