spi: Calculates the Standardized Precipitation Index (SPI)
In climstats: R functions for working with station and gridded climate data.

Calculates the standardized precipitation index (SPI).

1	spi(ppt, na.rm = TRUE)

`ppt`	A time series of precipitation amounts in a vector or a matrix with precipitation time series in each column.
`na.rm`	a logical indicating whether missing values should be removed.

`spi`	returns the SPI value for a precipitation vector.
`spi.matrix`	returns a vector of standardized precipitation indices for a precipitation matrix or the SPI value for a precipitation vector.

Jonathan A. Greenberg, Alison R. Mynsberge

climstats documentation built on May 2, 2019, 6:15 p.m.