daily_tidal_mean: Daily Tidal Mean
In SuisunMarshBranch/wqptools: Outlier Detection Working Group Toolbox

Compute the daily low-tide or high-tide average.

daily_tidal_mean(
  x,
  y,
  tide = c("high", "low"),
  smooth = TRUE,
  neighborhood = 24,
  family = "symmetric",
  degree = 2,
  ...,
  plot = FALSE
)

`x`	A vector of values from a single day.
`y`	A vector of water surface elevations from a single day.
`tide`	Return the high-tide ("high") or low-tide ("low") average.
`smooth`	If `TRUE`, A loess smoother will be applied to the data prior to detecting the water surface elevation minimums or maximums.
`neighborhood`	The neighborhood (number of points) used to determine the `span` argument to `stats::loess()`. A time window of 6 hours was found to work well with tidal data, which corresponds to 24 points for 15-minute data or 6 points for hourly data.
`family`	The `family` argument to `stats::loess()`. The default family "symmetric" was found to work well with 15-minute tidal data.
`degree`	The `degree` argument to `stats::loess()`. The default degree of 2 was found to work well with 15-minute tidal data.
`...`	Additional arguments to `stats::loess()`.Note that the value of `span` is computed from the argument `neighborhood`.
`plot`	If `TRUE`, printdiagnostic plots of the loess smoothing.