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SPEI (version 1.8.1)

Generalized-Logistic: Generalized Logistic maximum likelihood function

Description

Maximum likelihood fitting function for generalized logistic distribution.

Usage

parglo.maxlik(x, ini)

Value

a list of parameters of a generalized Logistic distribution function

Arguments

x

vector of quantiles for which to evaluate the PDF.

ini

a vector of initial values of the parameters to be fit.

Author

Santiago Beguería

Details

This function is used internally by spei and spi and is supposed to never be needed by the regular user. Initial values for maximum likelihood estimation can be provided by parglo.

References

S.M. Vicente-Serrano, S. Beguería, J.I. López-Moreno. 2010. A Multi-scalar drought index sensitive to global warming: The Standardized Precipitation Evapotranspiration Index – SPEI. Journal of Climate 23: 1696, DOI: 10.1175/2009JCLI2909.1.