Function builtin_read_csv 

fn builtin_read_csv(
    args: &[RValue],
    named: &[(String, RValue)],
    context: &BuiltinContext<'_>,
) -> Result<RValue, RError>

Read a CSV file into a data frame.

@param file character scalar: path to the CSV file @param header logical: does the file have a header row? (default TRUE) @param sep character scalar: field separator (default “,”) @return data.frame with columns coerced to numeric where possible