Pm_Pisco                The data set for illustratrating the functions
                        of the SPIGA package
SPIFromParameters       Calculation of standardized precipitation index
                        from alpha and beta parameter of the Gamma
                        function.
SPIGA                   Calculation of Standardized Precipitation
                        Index, using the Genetic Algorithm Method
                        (SPIGA) and Maximum Likelihood (SPIML)
alphaBetaMV             Generic methods for 'SPIGA' objects.
