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Deep Learning with Theano

You're reading from   Deep Learning with Theano Perform large-scale numerical and scientific computations efficiently

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Product type Paperback
Published in Jul 2017
Publisher Packt
ISBN-13 9781786465825
Length 300 pages
Edition 1st Edition
Tools
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Author (1):
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Christopher Bourez Christopher Bourez
Author Profile Icon Christopher Bourez
Christopher Bourez
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Table of Contents (15) Chapters Close

Preface 1. Theano Basics 2. Classifying Handwritten Digits with a Feedforward Network FREE CHAPTER 3. Encoding Word into Vector 4. Generating Text with a Recurrent Neural Net 5. Analyzing Sentiment with a Bidirectional LSTM 6. Locating with Spatial Transformer Networks 7. Classifying Images with Residual Networks 8. Translating and Explaining with Encoding – decoding Networks 9. Selecting Relevant Inputs or Memories with the Mechanism of Attention 10. Predicting Times Sequences with Advanced RNN 11. Learning from the Environment with Reinforcement 12. Learning Features with Unsupervised Generative Networks 13. Extending Deep Learning with Theano Index

Training


In order to get a good measure of how the model behaves on data that's unseen during training, the validation dataset is used to compute a validation loss and accuracy during training.

The validation dataset enables us to choose the best model, while the test dataset is only used at the end to get the final test accuracy/error of the model. The training, test, and validation datasets are discrete datasets, with no common examples. The validation dataset is usually 10 times smaller than the test dataset to slow the training process as little as possible. The test dataset is usually around 10-20% of the training dataset. Both the training and validation datasets are part of the training program, since the first one is used to learn, and the second is used to select the best model on unseen data at training time.

The test dataset is completely outside the training process and is used to get the accuracy of the produced model, resulting from training and model selection.

If the model overfits...

You have been reading a chapter from
Deep Learning with Theano
Published in: Jul 2017
Publisher: Packt
ISBN-13: 9781786465825
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