From 09a8abb3c56cb613b5b6f2a4f67a7c6b5e940782 Mon Sep 17 00:00:00 2001 From: Sam Abbott Date: Wed, 28 Aug 2024 13:50:02 +0100 Subject: [PATCH] Update NEWS.md --- NEWS.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/NEWS.md b/NEWS.md index 06984b8ea..3f261c7bd 100644 --- a/NEWS.md +++ b/NEWS.md @@ -13,7 +13,7 @@ - When defining probability distributions these can now be truncated using the `tolerance` argument - Ornstein-Uhlenbeck and 5 / 2 Matérn kernels have been added. By @sbfnk in #741 and reviewed by @seabbs. - Gaussian processes have been vectorised, leading to some speed gains 🚀 , and the `gp_opts()` function has gained three more options, "periodic", "ou", and "se", to specify periodic and linear kernels respectively. By @seabbs in #742 and reviewed by @jamesmbaazam. -- Prior predictive checks have been used to update the following priors: the prior on the magnitude of the Gaussian process (from HalfNormal(0, 1) to HalfNormal(0, 0.1)), and the prior on the overdispersion (from 1 / HalfNormal(0, 1)^2 to 1 / HalfNormal(0, 0.25)). By @seabbs in #742 and reviewed by @jamesmbaazam. +- Prior predictive checks have been used to update the following priors: the prior on the magnitude of the Gaussian process (from HalfNormal(0, 1) to HalfNormal(0, 0.1)), and the prior on the overdispersion (from 1 / HalfNormal(0, 1)^2 to 1 / HalfNormal(0, 0.25)). In the user-facing API, this is a change in default values of the `sd` of `phi` in `obs_opts()` from 1 to 0.25. By @seabbs in #742 and reviewed by @jamesmbaazam. - The default stan control options have been updated from `list(adapt_delta = 0.95, max_treedepth = 15)` to `list(adapt_delta = 0.9, max_treedepth = 12)` due to improved performance and to reduce the runtime of the default parameterisations. By @seabbs in #742 and reviewed by @jamesmbaazam. - Initialisation has been simplified by sampling directly from the priors, where possible, rather than from a constrained space. By @seabbs in #742 and reviewed by @jamesmbaazam. - Unnecessary normalisation of delay priors has been removed. By @seabbs in #742 and reviewed by @jamesmbaazam.