Four-Project Series
Training Models on Imbalanced Text Data you own this product
- prerequisites
- intermediate Python • basics of NumPy, pandas, and Jupyter Notebook
- skills learned
- use a dictionary to decode and encode data • learn NumPy array indexing techniques • understand Python dictionary data structure and how to edit and manipulate it
In this series of liveProjects, you’ll take on the role of a data scientist working for an online movie streaming service. Your bosses want a machine learning model that can analyze written customer reviews of your movies, but you discover that the data is biased towards negative reviews. Training a model on this imbalanced data would hurt its accuracy, and so your challenge is to create a balanced dataset for your model to learn from. You'll collect your company’s data by deliberately introducing imbalance to an IMDb (Internet Movie Database) review dataset, use a sampling technique to balance the dataset, then build a machine learning model from the dataset.
These projects are designed for learning purposes and are not complete, production-ready applications or solutions.
here's what's included
Project 1 Explore IMDb Dataset
In this liveProject, you’ll explore a dataset of movie reviews and prepare it for sentiment analysis. The dataset you've provided is balanced between positive and negative reviews, but is encoded in such a way that you will need to use the dictionary (lookup) in this dataset package to decode the content to plain text. Your challenges will include decoding the data to plain text, and then converting the plain text into tokens in a Pythonic manner.
Project 2 Manipulate Data Distribution
In this liveProject, you will create an imbalanced dataset from the IMDb movie dataset. Your goal is to make a dataset where positive reviews are the minority. You’ll then test a theory that if you oversample positive reviews, you could rebalance the training data to build and train a text classification model. You finish up by examining the model performance with a confusion table, and basic metrics such as precision, accuracy and recall.
Project 3 Generate Text Samples
In this liveProject, you’ll build a deep learning model that can generate text in order to create synthetic training data. You’ll establish a data training set of positive movie reviews, and then create a model that can generate text based on the data. This approach is the basis of data augmentation.
Project 4 Augment Training Data and Classify Text
In this liveProject, you’ll augment text-based training data for a sentiment analysis algorithm with artificially generated positive reviews. You’ll merge the synthetic positive reviews with an unbalanced dataset focused on negative reviews, thereby creating a balanced dataset for your model to train on. You’ll train your model, then evaluate its metrics using sklearn.
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Training Models on Imbalanced Text Data eBook for free
Training Models on Imbalanced Text Data eBook for free
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- five seats for your team
- access to all Manning books, MEAPs, liveVideos, liveProjects, and audiobooks!
- choose another free eBook every time you renew
- choose twelve free eBooks per year
- exclusive 50% discount on all purchases
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Training Models on Imbalanced Text Data eBook for free
Prerequisites
This liveProject is for Python programmers interested in common tools for encoding data for NLP. To begin this liveProject, you will need to be familiar with the following:
TOOLS
- Intermediate Python, with basics of NumPy and pandas
- Basics of Jupyter Notebook
- Basics of Google Colab notebook
- Basics of TensorFlow
- Basics of NLP
- Basics of deep learning
you will learn
In this liveProject, you’ll learn the basics of encoding and decoding techniques. These are common techniques for solving natural language processing (NLP) problems.
- Use tf.keras.datasets module for accessing IMDb movie review dataset
- Learn NumPy array indexing techniques
- Understand Python dictionary data structure, and how to edit and manipulate it
- Use a dictionary to decode and encode data
features
- Self-paced
- You choose the schedule and decide how much time to invest as you build your project.
- Project roadmap
- Each project is divided into several achievable steps.
- Get Help
- While within the liveProject platform, get help from other participants and our expert mentors.
- Compare with others
- For each step, compare your deliverable to the solutions by the author and other participants.
- book resources
- Get full access to select books for 90 days. Permanent access to excerpts from Manning products are also included, as well as references to other resources.
