Normalize observations, effort, or times

normalize_obs will normalize the observations to the provided effort vector, if obs_per_effort is TRUE.

normalize_effort will generate a default effort vector if it is not provided, (effort = 1 over the provided obs time series)

normalize_times will generate a default times vector if it is not provided, (times = seq(length(obs)))

normalize_obs(obs, effort, obs_per_effort = !is.null(effort))

normalize_times(obs, times = NULL)

normalize_effort(obs, effort = NULL)

Arguments

obs	the time series of numeric observations
effort	numeric vector of effort associated with the observations.
obs_per_effort	logical indicator if obs should be corrected for effort before summaries are done.
times	numeric or Date vector of timestamps of the observations.