% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/BEI_Weights.R
\name{BEI_Weights}
\alias{BEI_Weights}
\title{Computing the weights for SFSs using the Best Index PDFs.}
\usage{
BEI_Weights(index_weight, pdf_weight, time_dim_name = "time")
}
\arguments{
\item{index_weight}{Index (e.g. NAO index) array, from a dataset of SFSs
for a period of years, with at least dimensions 'member'. 
Additional dimensions, for instance, a temporal dimension as 'time', 
must have the same lenght in both parameters, 
'index_weight' and 'pdf_weight'.}

\item{pdf_weight}{Statistics array to define a Gaussian PDF with at least 
dimensions 'statistic'.
The firt statistic is the parameter 'mean' of the PDF and
the second statistic is the parameter 'standard deviation' of the PDF.}

\item{time_dim_name}{A character string indicating the name of the temporal dimension, by default 'time'.}
}
\value{
BEI_Weights() returns a normalized weights array with the same 
dimensions that index_weight.
}
\description{
This function implements the computation to obtain the
normalized weights for each member of each SFS or dataset using the 
pdfs indicated by the parameter 'pdf_weight' ( for instance the Best Index 
estimation obtained using the 'PDFBest' function.
}
\examples{
# Example for the BEI_Weights function
index_weight <- 1 : (10 * 3 * 5 * 1)
dim(index_weight) <- c(sdate = 10, dataset = 3, member = 5, season = 1)
pdf_weight <- 1 : (10 * 3 * 2 * 1)
dim(pdf_weight) <- c(sdate = 10, dataset = 3, statistic = 2, season = 1)
res <- BEI_Weights(index_weight, pdf_weight)
dim(res)
# sdate   dataset    member season
#    10         3         5      1

}
\author{
Eroteida Sanchez-Garcia - AEMET, \email{esanchezg@aemet.es}
}
\references{
Regionally improved seasonal forecast of precipitation through Best
estimation of winter NAO, Sanchez-Garcia, E. et al.,
Adv. Sci. Res., 16, 165174, 2019, https://doi.org/10.5194/asr-16-165-2019
}

