plot_progress: Plot users progress
In zachary-foster/flashcards: Functions to Create and Practice Digital Flashcards

Plot the progress on one or more decks for a user's home directory.

1 2	plot_progress(user_dir = getwd(), decks = NULL, progress = "progress.tsv", library = "decks", min_cards = 10)

`user_dir`	The path to the folder containing the deck library, progress file, and history file. If the folder was created using `init_user_dir`, this is the only argument needed. By default, this is the current working directory.
`decks`	The names or folder paths of one or more decks to practice on. If "library" is supplied, then these paths are relative to it. By default, all decks in "library" are used.
`progress`	The file used to store a user's progress for one or more decks. By default, this is a file called "progress.tsv". If "user_dir" is supplied, then this paths is relative to it. If `NULL`, no progress file is used.
`library`	The path to the deck library. This is where the user stores their decks and practice history. By default, this is a directory called "decks" in the user folder. If "user_dir" is supplied, then this paths is relative to it.
`min_cards`	Decks with fewer cards than this will be compressed into a single deck.