simpleCharArg function

Check that a variable is a single character string meeting specified requirements

simpleCharArg(name.arg, val.arg, default, accepted, lower = TRUE, clean = TRUE)

Arguments

• name.arg: Name of the argument
• val.arg: argument value
• default: If val.arg is NULL, what should be returned?
• accepted: What values are allowed
• lower: run tolower?
• clean: clean white spaces?

Returns

The resulting parameter value

Details

Better options may be available in packages like checkmate. This function doesn't only check the parameter value, it also sets it to the default value if missing.