← All changes | libraries/vendor/PhpSpreadsheet/Calculation/Statistical/Distributions/Gamma.php +8 -1 3.3.2 → 3.4 View file →

		@@ -84,8 +84,12 @@
84	84	* GAMMAINV.
85	85	*
86	86	* Returns the inverse of the Gamma distribution.
87	87	*
	88	+ * For a probability so far into the upper tail that the forward-CDF series
	89	+ * approximation plateaus below it, the root cannot be bracketed; the result
	90	+ * is capped at the alpha*beta*5 search ceiling rather than diverging.
	91	+ *
88	92	* @param mixed $probability Float probability at which you want to evaluate the distribution
89	93	* Or can be an array of values
90	94	* @param mixed $alpha Parameter to the distribution as a float
91	95	* Or can be an array of values
		@@ -142,7 +146,10 @@
142	146	if ($value <= 0) {
143	147	return ExcelError::NAN();
144	148	}
145	149
146		- return log(self::gammaValue($value));
	150	+ $result = self::logGamma($value);
	151	+
	152	+ // logGamma returns its MAX_VALUE sentinel when the result would overflow.
	153	+ return ($result >= self::MAX_VALUE) ? ExcelError::NAN() : $result;
147	154	}
148	155	}