getMeanPreci function

Get mean rainfall data.

Get mean rainfall data, e.g. mean annual rainfall, mean monthly rainfall and mean winter rainfall.

getMeanPreci(
  inputTS,
  method = NULL,
  yearIndex = NULL,
  monthIndex = NULL,
  fullResults = FALSE,
  omitNA = TRUE,
  plot = FALSE,
  ...
)

Arguments

• inputTS: A time series with only data column (1 column).
• method: A string showing the method used to calculate mean value, e.g., "annual". more information please refer to details.
• yearIndex: A NUMERIC ARRAY showing the year index of the time series.
• monthIndex: A NUMERIC ARRAY showing the month index of the time series.
• fullResults: A boolean showing whether the full results are shown, default is FALSE. If FALSE, only mean value will be returned, if TRUE, the sequence of values will be returned.
• omitNA: A boolean showing in the calculation, whether NA is omitted, default is FALSE.
• plot: A boolean showing whether the results will be plotted.
• ...,: title, x, y showing the title and x and y axis of the plot, shoud be a string.

Returns

The mean value of the input time series or the full results before calculating mean.

Details

There are following methods to be selected, "annual": annual rainfall of each year is plotted. "winter", "spring", "autumn", "summer": seasonal rainfall of each year is plotted. Month(number 1 to 12): month rainfall of each year is plotted, e.g. march rainfall of each year. "meanMonthly": the mean monthly rainfall of each month over the whole period.

Since "winter" is a crossing year, 12, 1, 2, 12 is in former year, and 1, 2 are in latter year. so winter belongs to the latter year.