LDLcalc (version 2.1)

LDL_HDLVrnc: Calculate LDL variance when HDL variance changes

Description

This function calculates the variance of LDL using two methods: Error Propagation and Bootstrap when the HDL distribution changes. It uses a data frame where each column contains a different set of HDL values of increasing variance as the column index increases.

Usage

LDL_HDLVrnc(dfHDL, CHOL, TG, bootStrpReps = 2000)

Value

The function returns a list with the Error Propagation variance (ErrPropVrnc) and the bootstrap variance (BootVrnc). Each list element is a vector of length equal to the number of columns of the HDL data frame supplied as argument (dfHDL) and each vector value corresponds to the respective variance of the corresponding data frame columns.

Arguments

dfHDL

A data frame where each column contains a different set of HDL values of increasing variance as the column index increases.

CHOL

A vector or data frame column containing the cholesterol values to be used for the calculation of the variance of LDL.

TG

A vector or data frame column containing the triglyceride values to be used for the calculation of the variance of LDL.

bootStrpReps

(Default=2000) Number of bootstrap iterations for bootstrap variance calculation.

Examples

if (FALSE) {
dfHDL = CV_Range(sampleA$HDL, 0, 100, maxRandIter = 4000, plot=FALSE)
LDLHDLVar = LDL_HDLVrnc(dfHDL,sampleA$CHOL,sampleA$TG,bootStrpReps=2000)
}