23 lines
No EOL
943 B
R
23 lines
No EOL
943 B
R
# First weighting vector of the modified quadratic estimating equation (Crowder)
|
|
#
|
|
# Author: Francois Pelletier
|
|
#
|
|
# LGPL-3.0
|
|
###############################################################################
|
|
|
|
#' First weighting vector of the modified quadratic estimating equation (Crowder)
|
|
#'
|
|
#' @param param Vector of parameters of the distribution function
|
|
#' @param Y Individual data sample
|
|
#' @param variancef Variance function of the distribution
|
|
#' @param dmean Derivative in respect to the parameter vector of the mean function of the distribution
|
|
#' @param dsd Derivative in respect to the parameter vector of the standard deviation function of the distribution
|
|
#' @return First weighting vector
|
|
#' @export a.Crowder.Mod
|
|
#' @author Francois Pelletier
|
|
a.Crowder.Mod <- function(param,Y,variancef,dmean,dsd)
|
|
{
|
|
(-(moments::kurtosis(Y)-1)*dmean(param)+
|
|
2*moments::skewness(Y)*dsd(param))/
|
|
(variancef(param)*gammaf.Crowder.Mod(Y))
|
|
} |