From a2c5df956ffcc968b9a22cf97311663c861fa6af Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?S=C3=A9bastien=20Villemot?= Date: Wed, 10 Mar 2021 14:44:19 +0100 Subject: [PATCH] =?UTF-8?q?Manual:=20add=20a=20short=20description=20of=20?= =?UTF-8?q?how=20decision=20rules=20are=20stored=20at=20order=20=E2=89=A5?= =?UTF-8?q?=204?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Closes: #1764 --- doc/manual/source/the-model-file.rst | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/doc/manual/source/the-model-file.rst b/doc/manual/source/the-model-file.rst index 22e3a4bdd..cabae8cbb 100644 --- a/doc/manual/source/the-model-file.rst +++ b/doc/manual/source/the-model-file.rst @@ -4503,6 +4503,20 @@ The coefficients of the decision rules are stored as follows: unfolded :math:`G_3` matrix, they must be multiplied by 3 when computing the decision rules. +Higher-order approximation +-------------------------- + +Higher-order approximations are simply a generalization of what is done at +order 3. + +The steady state is stored in ``oo_.dr.ys`` and the constant correction is +stored in ``oo_.dr.g_0``. The coefficient for orders 1, 2, 3, 4… are +respectively stored in ``oo_.dr.g_0``, ``oo_.dr.g_1``, ``oo_.dr.g_2``, +``oo_.dr.g_3``, ``oo_.dr.g_4``… The columns of those matrices correspond to +multidimensional indices of state variables, in such a way that symmetric +elements are never repeated (for more details, see the description of +``oo_.dr.g_3`` in the third-order case). + .. _estim: