This is an implementation of WideDeep as described in the [Wide & Deep Learning for Recommender System](https://arxiv.org/pdf/1606.07792.pdf) paper.
WideDeep model jointly trained wide linear models and deep neural network, which combined the benefits of memorization and generalization for recommender systems.
## Dataset
The [Criteo datasets](http://labs.criteo.com/2014/02/download-kaggle-display-advertising-challenge-dataset/) are used for model training and evaluation.
## Running Code
### Download and preprocess dataset
To download the dataset, please install Pandas package first. Then issue the following command:
```
bash download.sh
```
### Code Structure
The entire code structure is as following:
```
|--- wide_and_deep/
train_and_test.py "Entrance of Wide&Deep model training and evaluation"
test.py "Entrance of Wide&Deep model evaluation"
train.py "Entrance of Wide&Deep model training"
train_and_test_multinpu.py "Entrance of Wide&Deep model data parallel training and evaluation"
|--- src/ "entrance of training and evaluation"
config.py "parameters configuration"
dataset.py "Dataset loader class"
WideDeep.py "Model structure"
callbacks.py "Callback class for training and evaluation"
metrics.py "Metric class"
```
### Train and evaluate model
To train and evaluate the model, issue the following command:
```
python train_and_test.py
```
Arguments:
* `--data_path`: This should be set to the same directory given to the data_download's data_dir argument.
* `--epochs`: Total train epochs.
* `--batch_size`: Training batch size.
* `--eval_batch_size`: Eval batch size.
* `--field_size`: The number of features.
* `--vocab_size`: The total features of dataset.
* `--emb_dim`: The dense embedding dimension of sparse feature.
* `--deep_layers_dim`: The dimension of all deep layers.
* `--deep_layers_act`: The activation of all deep layers.
* `--keep_prob`: The rate to keep in dropout layer.
* `--ckpt_path`:The location of the checkpoint file.
* `--eval_file_name` : Eval output file.
* `--loss_file_name` : Loss output file.
To train the model, issue the following command:
```
python train.py
```
Arguments:
* `--data_path`: This should be set to the same directory given to the data_download's data_dir argument.
* `--epochs`: Total train epochs.
* `--batch_size`: Training batch size.
* `--eval_batch_size`: Eval batch size.
* `--field_size`: The number of features.
* `--vocab_size`: The total features of dataset.
* `--emb_dim`: The dense embedding dimension of sparse feature.
* `--deep_layers_dim`: The dimension of all deep layers.
* `--deep_layers_act`: The activation of all deep layers.
* `--keep_prob`: The rate to keep in dropout layer.
* `--ckpt_path`:The location of the checkpoint file.
* `--eval_file_name` : Eval output file.
* `--loss_file_name` : Loss output file.
To evaluate the model, issue the following command:
```
python test.py
```
Arguments:
* `--data_path`: This should be set to the same directory given to the data_download's data_dir argument.
* `--epochs`: Total train epochs.
* `--batch_size`: Training batch size.
* `--eval_batch_size`: Eval batch size.
* `--field_size`: The number of features.
* `--vocab_size`: The total features of dataset.
* `--emb_dim`: The dense embedding dimension of sparse feature.
* `--deep_layers_dim`: The dimension of all deep layers.
* `--deep_layers_act`: The activation of all deep layers.
* `--keep_prob`: The rate to keep in dropout layer.
* `--ckpt_path`:The location of the checkpoint file.
* `--eval_file_name` : Eval output file.
* `--loss_file_name` : Loss output file.
There are other arguments about models and training process. Use the `--help` or `-h` flag to get a full list of possible arguments with detailed descriptions.