Difference between revisions of "Documentation/How Tos/Calc: GAMMA function"

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{{Documentation/MasterTOC
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|bookid=1234'''
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|booktitle=<div style="padding: 8px; font-size: 140%; font-weight: bold; background-color: #9BC0F5;">CALC FUNCTIONS</div>
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|ShowParttitle=block|parttitle=[[Documentation/How_Tos/Calc:_Statistical_functions|<div style="font-size: 140%;">Statistical Functions]]
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|ShowNextPage=block|NextPage=Documentation/How_Tos/Calc:_GAMMAINV_function
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|ShowPrevPage=block|PrevPage=Documentation/How_Tos/Calc:_FTEST_function
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|ShowPrevPart=block|PrevPart=Documentation/How_Tos/Calc:_Spreadsheet_functions
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|ShowNextPart=block|NextPart=Documentation/How_Tos/Calc:_Text_functions
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|toccontent= <div style="padding: 4px; font-size: 130%; font-weight: hidden; background-color:#DCE9FC;">FUNCTIONS</div>
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<div style="font-size: 140%; border-style: outset outset outset none; border-color:#DCE9FC;">Measures of Central Tendency</div>
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* [[Documentation/How_Tos/Calc:_AVEDEV_function|<div style="font-size: 120%;">Avedev]]
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* [[Documentation/How_Tos/Calc:_AVERAGE_function|<div style="font-size: 120%;">Average]]
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* [[Documentation/How_Tos/Calc:_AVERAGEA_function|<div style="font-size: 120%;">Averagea]]
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* [[Documentation/How_Tos/Calc:_COUNT_function|<div style="font-size: 120%;">Count]]
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* [[Documentation/How_Tos/Calc:_COUNTA_function|<div style="font-size: 120%;">Counta]]
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* [[Documentation/How_Tos/Calc:_GEOMEAN_function|<div style="font-size: 120%;">Geomean]]
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* [[Documentation/How_Tos/Calc:_HARMEAN_function|<div style="font-size: 120%;">Hearmean]]
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* [[Documentation/How_Tos/Calc:_MEDIAN_function|<div style="font-size: 120%;">Median]]
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* [[Documentation/How_Tos/Calc:_MODE_function|<div style="font-size: 120%;">Mode]]
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* [[Documentation/How_Tos/Calc:_TRIMMEAN_function|<div style="font-size: 120%;">Trimmean]]
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<div style="font-size: 140%; border-style: outset outset outset none; border-color:#DCE9FC;">Measures of dispersion / spread</div>
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* [[Documentation/How_Tos/Calc:_DEVSQ_function|<div style="font-size: 120%;">Devsq]]
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* [[Documentation/How_Tos/Calc:_KURT_function|<div style="font-size: 120%;">Kurt]]
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* [[Documentation/How_Tos/Calc:_SKEW_function|<div style="font-size: 120%;">Skew]]
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* [[Documentation/How_Tos/Calc:_STDEV_function|<div style="font-size: 120%;">Stdev]]
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* [[Documentation/How_Tos/Calc:_STDEVA_function|<div style="font-size: 120%;">Stedeva]]
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* [[Documentation/How_Tos/Calc:_STDEVP_function|<div style="font-size: 120%;">Stdevp]]
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* [[Documentation/How_Tos/Calc:_STDEVPA_function|<div style="font-size: 120%;">Stdevpa]]
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* [[Documentation/How_Tos/Calc:_VAR_function|<div style="font-size: 120%;">Var]]
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* [[Documentation/How_Tos/Calc:_VARA_function|<div style="font-size: 120%;">Vara]]
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* [[Documentation/How_Tos/Calc:_VARP_function|<div style="font-size: 120%;">Varp]]
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* [[Documentation/How_Tos/Calc:_VARPA_function|<div style="font-size: 120%;">Varpa]]
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<div style="font-size: 140%; border-style: outset outset outset none; border-color:#DCE9FC;">Probability and statistics</div>
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* [[Documentation/How_Tos/Calc:_B_function|<div style="font-size: 120%;">B]]
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* [[Documentation/How_Tos/Calc:_BETADIST_function|<div style="font-size: 120%;">Betadist]]
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* [[Documentation/How_Tos/Calc:_BETAINV_function|<div style="font-size: 120%;">Betainv]]
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* [[Documentation/How_Tos/Calc:_BINOMDIST_function|<div style="font-size: 120%;">Binomdist]]
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* [[Documentation/How_Tos/Calc:_CHIDIST_function|<div style="font-size: 120%;">Chidist]]
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* [[Documentation/How_Tos/Calc:_CHIINV_function|<div style="font-size: 120%;">Chiinv]]
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* [[Documentation/How_Tos/Calc:_CHISQINV_function|<div style="font-size: 120%;">Chisqinv]]
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* [[Documentation/How_Tos/Calc:_CHITEST_function|<div style="font-size: 120%;">Chitest]]
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* [[Documentation/How_Tos/Calc:_CONFIDENCE_function|<div style="font-size: 120%;">Confidence]]
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* [[Documentation/How_Tos/Calc:_CRITBINOM_function|<div style="font-size: 120%;">Critbinom]]
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* [[Documentation/How_Tos/Calc:_EXPONDIST_function|<div style="font-size: 120%;">Expondist]]
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* [[Documentation/How_Tos/Calc:_FINV_function|<div style="font-size: 120%;">Finv]]
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* [[Documentation/How_Tos/Calc:_FISHER_function|<div style="font-size: 120%;">Fisher]]
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* [[Documentation/How_Tos/Calc:_FISHERINV_function|<div style="font-size: 120%;">Fisherinv]]
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* [[Documentation/How_Tos/Calc:_FDIST_function|<div style="font-size: 120%;">Fdist]]
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* [[Documentation/How_Tos/Calc:_FTEST_function|<div style="font-size: 120%;">Ftest]]
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* [[Documentation/How_Tos/Calc:_GAMMA_function|<div style="font-size: 120%; border-style: double; border-color:#778899;">Gamma]]
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* [[Documentation/How_Tos/Calc:_GAMMAINV_function|<div style="font-size: 120%;">Gammainv]]
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* [[Documentation/How_Tos/Calc:_GAMMALN_function|<div style="font-size: 120%;">Gammaln]]
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* [[Documentation/How_Tos/Calc:_GAMMADIST_function|<div style="font-size: 120%;">Gammadist]]
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* [[Documentation/How_Tos/Calc:_GAUSS_function|<div style="font-size: 120%;">Gauss]]
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* [[Documentation/How_Tos/Calc:_HYPGEOMDIST_function|<div style="font-size: 120%;">Hypgeomdist]]
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* [[Documentation/How_Tos/Calc:_LOGINV_function|<div style="font-size: 120%;">Loginv]]
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* [[Documentation/How_Tos/Calc:_LOGNORMDIST_function|<div style="font-size: 120%;">Lognormdist]]
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* [[Documentation/How_Tos/Calc:_NEGBINOMDIST_function|<div style="font-size: 120%;">Negbinomdist]]
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* [[Documentation/How_Tos/Calc:_NORMINV_function|<div style="font-size: 120%;">Norminv]]
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* [[Documentation/How_Tos/Calc:_NORMDIST_function|<div style="font-size: 120%;">Normdist]]
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* [[Documentation/How_Tos/Calc:_NORMSINV_function|<div style="font-size: 120%;">Normsinv]]
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* [[Documentation/How_Tos/Calc:_NORMSDIST_function|<div style="font-size: 120%;">Normsdist]]
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* [[Documentation/How_Tos/Calc:_PERMUT_function|<div style="font-size: 120%;">Permut]]
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* [[Documentation/How_Tos/Calc:_PERMUTATIONA_function|<div style="font-size: 120%;">Permutationa]]
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* [[Documentation/How_Tos/Calc:_PHI_function|<div style="font-size: 120%;">Phi]]
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* [[Documentation/How_Tos/Calc:_POISSON_function|<div style="font-size: 120%;">Poisson]]
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* [[Documentation/How_Tos/Calc:_PROB_function|<div style="font-size: 120%;">Prob]]
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* [[Documentation/How_Tos/Calc:_STANDARDIZE_function|<div style="font-size: 120%;">Standardize]]
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* [[Documentation/How_Tos/Calc:_TDIST_function|<div style="font-size: 120%;">Tdist]]
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* [[Documentation/How_Tos/Calc:_TINV_function|<div style="font-size: 120%;">Tinv]]
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* [[Documentation/How_Tos/Calc:_TTEST_function|<div style="font-size: 120%;">Ttest]]
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* [[Documentation/How_Tos/Calc:_WEIBULL_function|<div style="font-size: 120%;">Weibull]]
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* [[Documentation/How_Tos/Calc:_ZTEST_function|<div style="font-size: 120%;">Ztest]]
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<div style="font-size: 140%; border-style: outset outset outset none; border-color:#DCE9FC;">Correlation and line fitting</div>
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* [[Documentation/How_Tos/Calc:_CORREL_function|<div style="font-size: 120%;">Correl]]
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* [[Documentation/How_Tos/Calc:_COVAR_function|<div style="font-size: 120%;">Covar]]
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* [[Documentation/How_Tos/Calc:_FORECAST_function|<div style="font-size: 120%;">Forecast]]
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* [[Documentation/How_Tos/Calc:_INTERCEPT_function|<div style="font-size: 120%;">Intercept]]
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* [[Documentation/How_Tos/Calc:_PEARSON_function|<div style="font-size: 120%;">Pearson]]
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* [[Documentation/How_Tos/Calc:_RSQ_function|<div style="font-size: 120%;">Rsq]]
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* [[Documentation/How_Tos/Calc:_SLOPE_function|<div style="font-size: 120%;">Slope]]
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* [[Documentation/How_Tos/Calc:_STEYX_function|<div style="font-size: 120%;">Steyx]]
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<div style="font-size: 110%;">''See also (in the [[Documentation/How_Tos/Calc:_Array_functions|Array Function]] category); GROWTH, LINEST, LOGEST, TREND''</div>
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<div style="font-size: 140%; border-style: outset outset outset none; border-color:#DCE9FC;">Ranking</div>
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* [[Documentation/How_Tos/Calc:_LARGE_function|<div style="font-size: 120%;">Large]]
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* [[Documentation/How_Tos/Calc:_MAX_function|<div style="font-size: 120%;">Max]]
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* [[Documentation/How_Tos/Calc:_MAXA_function|<div style="font-size: 120%;">Maxa]]
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* [[Documentation/How_Tos/Calc:_MIN_function|<div style="font-size: 120%;">Min]]
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* [[Documentation/How_Tos/Calc:_MINA_function|<div style="font-size: 120%;">Mina]]
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* [[Documentation/How_Tos/Calc:_PERCENTILE_function|<div style="font-size: 120%;">Percentile]]
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* [[Documentation/How_Tos/Calc:_PERCENTRANK_function|<div style="font-size: 120%;">Percentrank]]
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* [[Documentation/How_Tos/Calc:_QUARTILE_function|<div style="font-size: 120%;">Quartile]]
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* [[Documentation/How_Tos/Calc:_RANK_function|<div style="font-size: 120%;">Rank]]
 +
* [[Documentation/How_Tos/Calc:_SMALL_function|<div style="font-size: 120%;">Small]]
 +
}}__TOC__
  
 
== GAMMA ==
 
== GAMMA ==

Revision as of 23:32, 1 June 2013


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

Graph of the Gamma function

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

Retrieved from "https://wiki.openoffice.org/w/index.php?title=Documentation/How_Tos/Calc:_GAMMA_function&oldid=225899"
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