# How to properly use Simplex with Dirichlet likelihood?

**URL:** <https://discourse.mc-stan.org/t/how-to-properly-use-simplex-with-dirichlet-likelihood/18980>\
**Category:** Modeling\
**Created:** [October 29, 2020, 5:33pm UTC](https://discourse.mc-stan.org/t/how-to-properly-use-simplex-with-dirichlet-likelihood/18980 "2020-10-29T17:33:30Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![stemangiola](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mc-stan.org/stemangiola/32/260_2.png) [@stemangiola](https://discourse.mc-stan.org/u/stemangiola)\
**Post date:** [November 2, 2020, 7:21am UTC](https://discourse.mc-stan.org/t/how-to-properly-use-simplex-with-dirichlet-likelihood/18980/7 "2020-11-02T07:21:32Z")

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I see, rough was not about correctness (this would make the aswer to one post of mine [Jacobian of softmax tansformation of a (n-1 degrees of freedom) unbounded parameter](https://discourse.mc-stan.org/t/jacobian-of-softmax-tansformation-of-a-n-1-degrees-of-freedom-unbounded-parameter/18780/5)).

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