Documentation/How Tos/Calc: GAMMA function

CALC FUNCTIONS

Statistical Functions

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FUNCTIONS

Measures of Central Tendency

• Avedev
• Average
• Averagea
• Count
• Counta
• Geomean
• Hearmean
• Median
• Mode
• Trimmean

Measures of dispersion / spread

• Devsq
• Kurt
• Skew
• Stdev
• Stedeva
• Stdevp
• Stdevpa
• Var
• Vara
• Varp
• Varpa

Probability and statistics

• B
• Betadist
• Betainv
• Binomdist
• Chidist
• Chiinv
• Chisqinv
• Chitest
• Confidence
• Critbinom
• Expondist
• Finv
• Fisher
• Fisherinv
• Fdist
• Ftest
• Gamma
• Gammainv
• Gammaln
• Gammadist
• Gauss
• Hypgeomdist
• Loginv
• Lognormdist
• Negbinomdist
• Norminv
• Normdist
• Normsinv
• Normsdist
• Permut
• Permutationa
• Phi
• Poisson
• Prob
• Standardize
• Tdist
• Tinv
• Ttest
• Weibull
• Ztest

Correlation and line fitting

• Correl
• Covar
• Forecast
• Intercept
• Pearson
• Rsq
• Slope
• Steyx

See also (in the Array Function category); GROWTH, LINEST, LOGEST, TREND

Ranking

• Large
• Max
• Maxa
• Min
• Mina
• Percentile
• Percentrank
• Quartile
• Rank
• Small

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GAMMA

Returns the values of the Gamma function.

Syntax

GAMMA(x)

x is a number.

Constraint: If x is an integer, then x must be positive.

Semantic

GAMMA(x) calculates

.

Example

GAMMA(4) = 6.0 exact GAMMA(34.56) ≈ 6.2336323276E+037 GAMMA(−4) not defined

Remarks

For x < 0.5 Eulers reflection formula is used.

The Gamma function has poles for negative integers and for zero. Near the poles the values are less accurate.

If x is a positive integer, then

But be aware, that OpenOffice.org has only a precision of 15 digits and results, which would consists of more than 15 significant digits, are rounded.

Issues

This function is expected for OOo3.1. Issue 94555

See also

• GAMMALN
• GAMMADIST
• GAMMAINV
• FACT

• Mathematical functions

• Statistical functions

• Functions listed alphabetically
• Functions listed by category}}