This repository contains code for the following paper:
- Shi, Tianlin, and Jun Zhu. "Online Bayesian Passive-Aggressive Learning." Proceedings of The 31st International Conference on Machine Learning. 2014.
Specifically, the code is a streaming implementation of MedLDA
Maximum Entropy Discriminant LDA (MedLDA) is a max-margin supervised topic model. It jointly trains Latent Dirichlet Allocation (LDA) with SVM, and obtains a topic representation more suitable for discriminative tasks such as classification.
Online Bayesian PA (BayesPA) is a generalization of classic Passive-Aggressive learning to the Bayesian and latent-variable setting. For every incoming mini-batch of documents, BayesPA first applies Bayes' rule to update the LDA topic model, then projects the posterior distribution to a region where the hinge-loss on the mini-batch data is minimized.The python interface of Online MedLDA is simple.
To use, simply
import medlda
To create a classifer with 2 labels and 61188 words,
pamedlda = medlda.OnlineGibbsMedLDA(num_topic = 5, labels = 2, words = 61188)
The training and inference are also straightfoward,
pamedlda.train_with_gml('../data/binary_train.gml', batchsize=64)
(pred, ind, acc) = pamedlda.infer_with_gml('../data/binary_test.gml', num_sample=100)
Please refer to docs for more detals.
This release is for early adopters of this premature software. Please let us know if you have comments or suggestions. Contact: tianlinshi [AT] gmail.com
Online MedLDA is written in C++ 11, with a friendly python interface. It depends on gcc >= 4.8, python (numpy >= 1.7.0, distutils) and boost::python. To install, follow the instructions below.
# system dependency
sudo apt-get install libboost-all-dev gcc-4.8
sudo apt-get install python-numpy
brew install gcc
brew install boost --cc=gcc-4.9
brew install boost-python --cc=gcc-4.9
pip install numpy scipy
sudo python setup.py install
If you use online MedLDA in your work, please cite
Shi, T., & Zhu, J. (2014). Online Bayesian Passive-Aggressive Learning. In Proceedings of The 31st International Conference on Machine Learning (pp. 378-386).
Copyright (C) 2014 Tianlin Shi
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributeCd in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.
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