Help with "Functions to load and preprocess the corpus..."

[MaggieHawkins]

Hello! When I get to the "Functions to load and preprocess the corpus and create the document-term matrix" step I get stuck. I am just getting into coding through my digital humanities class, and know next to nothing. I am trying to run a topic model on a data set, but once I get to this step I am not sure what to add/change in the code. Any help would be greatly appreciated!