24 lines
997 B
R
24 lines
997 B
R
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# Second weighting vector of the quadratic estimating equation (Crowder)
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#
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# Author: Francois Pelletier
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#
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# LGPL-3.0
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###############################################################################
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#' Second weighting vector of the quadratic estimating equation (Crowder)
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#'
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#' @param param Vector of parameters of the distribution function
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#' @param variancef Variance function of the distribution
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#' @param skewnessf Skewness function of the distribution
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#' @param kurtosisf Kurtosis function of the distribution
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#' @param dmean Derivative in respect to the parameter vector of the mean function of the distribution
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#' @param dsd Derivative in respect to the parameter vector of the standard deviation function of the distribution
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#' @return First weighting vector
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#'
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#' @author Francois Pelletier
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b.Crowder <- function(param,variancef,skewnessf,kurtosisf,dmean,dsd)
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{
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(skewnessf(param)*dmean(param)-
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2*dsd(param))/
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(variancef(param)^(3/2)*gamma.Crowder(param,skewnessf,kurtosisf))
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}
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