Generic methods for spei objects {SPIGA}

Generic methods for SPIGA objects.

Description

Generic methods for extracting information and plotting SPIGA objects.

Usage

calcSPI(Pt,alpha, beta,m, nd)

Arguments

Pt

monthly precipitation series.

alpha

parameter to Gamma function.

beta

parameter to Gamma function.

m

Number of zeros in the column.

nd

Number total data.

Author(s)

Iván Arturo Ayala Bizarro <[e-mail]>

Jessica Zúñiga Mendoza <[e-mail]>

References

McKee, Thomas B. and Doesken, Nolan J. and Kleist, John. 1993. The relationship of Drought Frequency and Duration to Time Scales. Eighth Conference on Applied Climatology

A. Belauneh and J. Adamowski. Standard Precipitation Index Drought Forecasting Using Neural Networks, Wavelet Neural Networks, and Support Vector Regression. Applied Computational Intelligence and Soft Computing, http://dx.doi.org/10.1155/2012/794061