Excel GAMMA Function
The GAMMA function returns the value of the gamma function for a specified number.
Note: The GAMMA function was introduced in Excel 2013. So, it is not available in earlier versions of Excel.
- x (required): The number for which to calculate the gamma function value. Note: x must be a positive number or a negative decimal.
The GAMMA function returns a numeric value.
- GAMMA returns the #NUM! error if x is a negative integer or 0 (zero).
- GAMMA returns the #VALUE! error if x is not a numeric value.
- The equation for the gamma function Γ(n) is:
To calculate the gamma function value for the given x values listed in the following table, please copy or enter the formula below in the top cell, press Enter to get the result, and then drag the fill handle (at the lower right corner of the result cell) down to apply the formula to the below cells.
Also, you can type the actual x value in the formula as shown below.
Excel GAMMA.DIST Function
The GAMMA.DIST function returns the gamma distribution. The function is frequently used to provide probabilities for values that may have a skewed distribution, such as queuing analysis.
Excel GAMMA.INV Function
The GAMMA.INV function returns the inverse of the gamma cumulative distribution. The function is frequently used to provide probabilities for values that may have a skewed distribution, such as queuing analysis.
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