rai {precintcon}

Rainfall Anomaly Index

Description

Calculates the Rainfall Anomaly Index (RAI) on a daily or monthly precipitation serie.

Usage

rai(object, granularity = "m")

Arguments

object

a daily or monthly precipitation serie.

granularity

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")

Value

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.

Author(s)

Lucas Venezian Povoa [e-mail]

References

Van Rooy, M. P. "A rainfall anomaly index independent of time and space." Notos 14.43 (1965): 6.

See Also

pplot.rai read.data

Examples

##
# Loading the monthly precipitation serie.
data(monthly)

##
# Performing the Rainfall Anomaly Index analysis
rai(monthly, granularity = "m")