Standardized Climate Indices Such as SPI, SRI or SPEI

Functions for generating Standardized Climate Indices (SCI). SCI is a transformation of (smoothed) climate (or environmental) time series that removes seasonality and forces the data to take values of the standard normal distribution. SCI was originally developed for precipitation. In this case it is known as the Standardized Precipitation Index (SPI).


Reference manual

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1.0-2 by Lukas Gudmundsson, 5 years ago

Browse source code at

Authors: Lukas Gudmundsson & James H. Stagge

Documentation:   PDF Manual  

Task views: Probability Distributions, Hydrological Data and Modeling

GPL (>= 2) license

Depends on fitdistrplus, lmomco

Suggests evd

See at CRAN