OptionalalternativeAlternative hypothesis (unambiguous abbreviations accepted). Default "two.sided".
OptionalconfConfidence level of the interval. Default 0.95.
OptionalrHypothesized rate, or rate ratio for two samples (nonnegative). Default 1.
OptionalTTime base(s): one per count, positive and finite (R accepts 0 and returns NaN or Inf; an error here). Default 1 (or [1, 1]).
Options for poissonTest.