Whether to throw rock, paper, or scissors.
Can be abbreviated as "r", "p", or "s".
Defaults to NA, which interactively asks which to throw.
predict
If TRUE, the computer player fits a model on past games to
predict what you will throw and try to beat you.
record_data
If TRUE, save data from this game into a file.
This data is used for predictions when predict is TRUE.
Defaults to TRUE if the session is interactive and FALSE otherwise.
animate
If TRUE, play a "rock, paper, scissors, shoot!" animation
before revealing what you and the computer throw.
Defaults to TRUE if the session is interactive and FALSE otherwise.
header
If TRUE, prints a header for the game.
Defaults to TRUE if the session is interactive and FALSE otherwise.