Next Word Prediction

• The Next Word Prediction App (NWPA) is a web application which predicts the next word from a user input string
• The NWPA is a free web application available at https://chrisn267.shinyapps.io/word_predict_app
• It is a simple user friendly app which provides powerful predictive capabilities
• This presentation sets out a technical overview of the app as well as a user guide.

• The NWPA is a NLP machine learning application developed by Chris Nightingale as part of the John Hopkins Data Science Specialisation
• The NWPA uses a simple n-gram back-off model to predict the next word in a string
• The model is trained using 150,000 texts from US blogs, news articles and twitter feeds
• The model uses 3-gram prediction and if this does not find a suitable match it resorts to 2-gram then 1-gram.

• The NWPA is available here https://chrisn267.shinyapps.io/word_predict_app
• The app will take around 10 seconds to load when first opened, this is to bring the text corpus into memory
• The user enters a text string into the text box provided and presses 'generate word' to predict the next word
• The next word will appear in the output box alongside a chart which shows the top 5 predictions for the string
• The user can enter as many strings as they wish repeatedly and the app will work each time the button is pressed.

I hope you enjoy using the app. The code is available on my github page.