jonsedar / Pymc3_vs_pystan
Personal project to compare hierarchical linear regression in PyMC3 and PyStan, as presented at http://pydata.org/london2016/schedule/presentation/30/ video: https://www.youtube.com/watch?v=Jb9eklfbDyg
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Jonathan Sedar Personal Project
PyMC3 Vs PyStan Comparison
Spring 2016
This set of Notebooks and scripts comprise the pymc3_vs_pystan personal project by Jonathan Sedar of Applied AI Ltd, written primarily for presentation at the PyData London 2016 Conference.
The project demonstrates hierarchical linear regression using two Bayesian inference frameworks: PyMC3 and PyStan. The project borrows heavily from code written for Applied AI Ltd and is supplied here for educational purposes only. No copyright or license is extended to users.
Copyright Applied AI Ltd 2016
Development
Git clone the repo to your workspace.
e.g. in Mac OSX terminal:
$> git clone https://github.com/jonsedar/pymc3_vs_pystan.git
$> cd pymc3_vs_pystan
NOTES:
- This project uses Python 3.5, and was developed on a Macbook Pro OSX 10.10.5 using the Anaconda distro with a new virtualenv on 19 April 2016
- The project requires PyMC3 (with an associated Theano install) and PyStan (with an associated Stan install) so is quite heavy.
- Specific versions of key packages for clarity:
pymc3-3.0,theano-0.8.1,pystan-2.9.0.0
Setup a virtual environment for Python libraries
-
Using create a new virtualenv, installing packages from env YAML file:
$> conda env create --file conda_env_pymc3_vs_pystan.yml $> source activate pymc3_vs_pystan -
install remaining packages via pip (inc pymc3 master with deps):
$> ./pip_install.sh -
Launch Jupyter Notebook server
$> jupyter notebook
Data
Local data is not stored in the repo, and should be manually copied into the subdirectory data/
See file data/README_DATA.md for more info
General Notes:
File hack_findmap.py contains a customised find_MAP() function to correct
for pymc3's default behaviour of computing gradients when the chosen optimizer
doesn't use them. We don't want to compute gradients in large datasets because it's
quite computationally expensive.
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