# Gamma prior parameters

**URL:** <https://discourse.mc-stan.org/t/gamma-prior-parameters/18084>\
**Category:** brms\
**Created:** [September 19, 2020, 9:13am UTC](https://discourse.mc-stan.org/t/gamma-prior-parameters/18084 "2020-09-19T09:13:12Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![guisamor](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mc-stan.org/guisamor/32/8602_2.png) [@guisamor](https://discourse.mc-stan.org/u/guisamor)\
**Post date:** [September 19, 2020, 9:13am UTC](https://discourse.mc-stan.org/t/gamma-prior-parameters/18084/1 "2020-09-19T09:13:12Z")

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Hello,  
just a simple question I could not find a concrete answer:  
when we set set\_prior(“gamma(1,2) …”), which are the parameters of gamma there, shape=1, rate=2 ?

Thank you

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**Author:** ![mcol](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mc-stan.org/mcol/32/5598_2.png) [@mcol](https://discourse.mc-stan.org/u/mcol)\
**Post date:** [September 19, 2020, 9:56am UTC](https://discourse.mc-stan.org/t/gamma-prior-parameters/18084/2 "2020-09-19T09:56:21Z")

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Yes, checkout the relevant stan documentation: [https://mc-stan.org/docs/2\_24/functions-reference/gamma-distribution.html](https://mc-stan.org/docs/2_24/functions-reference/gamma-distribution.html).