Obtain Input from User With Error Handling
A simple function to detect input from the user, and keep prompting until a response matching the class of input required is given.
ask(prompt = "?", type = "logical", bounds = c(-Inf, Inf), na.allow = FALSE)
prompt |
what text string should be used to prompt the user? (character string) |
type |
the class of object expected to be returned - "logical", "numeric", "integer", "character". If the user input does not match this return, the prompt is repeated |
bounds |
the lower and upper bounds of number to be returned. Ignored if type is "logical" or "character". |
na.allow |
if TRUE, allows the user to input "NA" for any type, which is returned as NA |
Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.