# Quantile function of the gamma distribution

**URL:** <https://discourse.mc-stan.org/t/quantile-function-of-the-gamma-distribution/32809>\
**Category:** RStan\
**Created:** [September 19, 2023, 10:51am UTC](https://discourse.mc-stan.org/t/quantile-function-of-the-gamma-distribution/32809 "2023-09-19T10:51:43Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![eric\_rocha](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mc-stan.org/eric_rocha/32/16542_2.png) [@eric\_rocha](https://discourse.mc-stan.org/u/eric_rocha)\
**Post date:** [September 19, 2023, 10:51am UTC](https://discourse.mc-stan.org/t/quantile-function-of-the-gamma-distribution/32809/1 "2023-09-19T10:51:43Z")

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How do I get the quantiles similar to R (qgmma(.)) of the gamma distribution in Rstan?

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**Author:** ![aakhmetz](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mc-stan.org/aakhmetz/32/18672_2.png) [@aakhmetz](https://discourse.mc-stan.org/u/aakhmetz)\
**Post date:** [September 19, 2023, 2:43pm UTC](https://discourse.mc-stan.org/t/quantile-function-of-the-gamma-distribution/32809/2 "2023-09-19T14:43:44Z")

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by using gamma\_p?

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**Author:** ![eric\_rocha](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mc-stan.org/eric_rocha/32/16542_2.png) [@eric\_rocha](https://discourse.mc-stan.org/u/eric_rocha)\
**Post date:** [September 19, 2023, 4:09pm UTC](https://discourse.mc-stan.org/t/quantile-function-of-the-gamma-distribution/32809/3 "2023-09-19T16:09:24Z")

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I don’t know about this function, how do I use it?

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**Author:** ![jsocolar](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mc-stan.org/jsocolar/32/2486_2.png) [@jsocolar](https://discourse.mc-stan.org/u/jsocolar)\
**Post date:** [September 19, 2023, 4:15pm UTC](https://discourse.mc-stan.org/t/quantile-function-of-the-gamma-distribution/32809/4 "2023-09-19T16:15:59Z")

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Are you aware of the Stan Functions Reference here: [3.13 Combinatorial functions | Stan Functions Reference](https://mc-stan.org/docs/functions-reference/betafun.html) ?

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**Author:** ![eric\_rocha](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mc-stan.org/eric_rocha/32/16542_2.png) [@eric\_rocha](https://discourse.mc-stan.org/u/eric_rocha)\
**Post date:** [September 19, 2023, 4:32pm UTC](https://discourse.mc-stan.org/t/quantile-function-of-the-gamma-distribution/32809/5 "2023-09-19T16:32:57Z")

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Yes, but I need something like: [Gamma distribution quantile and inverse quantile function](https://discourse.mc-stan.org/t/gamma-distribution-quantile-and-inverse-quantile-function/22882)