Generic methods for spei objects {SPIGA} | R Documentation |
SPIGA
objects.Generic methods for extracting information and plotting SPIGA
objects.
calcSPI(Pt,alpha, beta,m, nd)
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. |
Iván Arturo Ayala Bizarro <ivan.ayala@unh.edu.pe>
Jessica Zúñiga Mendoza <zumeje@gmail.com>
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