Exercise

Align corpus

You have LDA model object train_mod and table corpus2 with initial data. You will need to align the corpus of the test records and make a document-term matrix for testing.

Instructions

100 XP

Rerun sample.int with set.seed to reproduce the row indices for testing rows.
Extract vocabulary of the training model using tidy
Create a table of counts, making sure that you keep only the rows with words that were present in the training data
Generate a document-term matrix with the testing data