Calculates the Rainfall Anomaly Index (RAI) on a daily or monthly precipitation serie.
rai(object, granularity = "m")
a daily or monthly precipitation serie.
the granularity applied for calculating the rainfall anomaly index, which should be either "m" for monthly granularity or "a" for annual granularity. (Default value: "m")
A data.frame (precintcon.rai) containing the following variables:
year is the year.
month is the month. This attribute exists only when granularity = "m".
rai is the rainfall anomaly index.
Lucas Venezian Povoa [email protected]
Van Rooy, M. P. "A rainfall anomaly index independent of time and space." Notos 14.43 (1965): 6.
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