Conditional autoregressive priors (#547)

* CAR notebook

* implementing oriol's suggestions + typo

* changed aesara.tensor to pytensor.tensor

* fixed execution order, made watermark render properly

* syncing myst nb to ipynb

* fix latex rendering

* oriol's suggestions + simplified pm.sample() arguments + removed discussion of divergences

* oriol's suggestions + simplified pm.sample() arguments + removed discussion of divergences

* metadata for myst substitutions

* metadata for myst substitutions

* still trying to get metadata right

* adjust title for old CAR notebook + correct myst substitutions syntax

* fixing preamble in previous commit

* change reference to conditional_autoregressive_prior -> conditional_autoregressive_priors

* reference -> explanation

---------

Co-authored-by: conorhassan <conordhassan@gmail.com>

Author: daniel-saunders-phil

examples/case_studies/conditional-autoregressive-model.ipynb

@@ -10,6 +10,19 @@ kernelspec:
   name: python3
 ---
 
+(conditional_autoregressive_model)=
+(about_CAR_models_in_pymc)=
+
+# About Conditional Autoregressive models in PyMC
+
+:::{post} Aug 14, 2020 
+:tags: spatial, autoregressive, count data
+:category: advanced, explanation
+:author: Junpeng Lao
+:::
+
+This notebook explains the design principles behind the Conditional Autoregressive (CAR) distribution as implemented in PyMC. For a simple tutorial of why and how to use the CAR distribution, see {ref}`this notebook <conditional_autoregressive_priors>`.
+
 ```{code-cell} ipython3
 import arviz as az
 import numpy as np
@@ -31,11 +44,6 @@ az.style.use("arviz-darkgrid")
 floatX = "float32"
 ```
 
-# Conditional Autoregressive (CAR) model
-A walkthrough of implementing a Conditional Autoregressive (CAR) model in `PyMC3`, with `WinBUGS`/`PyMC2` and `Stan` code as references.
-
-+++
-
 As a probabilistic language, there are some fundamental differences between `PyMC3` and other alternatives such as `WinBUGS`, `JAGS`, and `Stan`. In this notebook, I will summarise some heuristics and intuition I got over the past two years using `PyMC3`. I will outline some thinking in how I approach a modelling problem using `PyMC3`, and how thinking in linear algebra solves most of the programming problems. I hope this notebook will shed some light onto the design and features of `PyMC3`, and similar languages that are built on linear algebra packages with a static world view (e.g., Edward, which is based on Tensorflow).