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# Calculate the local kernel matrix and its rank factorization
#
# @param Rmc vector subset of variant similarity matrix R for the mth marker
# and cvth c value (R[,m,cv])
# @param snp nxM genotype snp matrix
# @param kernel object of class Kernel
# @param nullResult fit results of null model
# @param X matrix of non-genetic covariates
# @param pvMethod object of class pvMethod
# @param eps matrix of perturbations
# @param ... ignored
#
# @return a list containing \cr
# pvObs : p-value of observed test statistic \cr
# pvResamp : p-value of perturbed test statistic \cr
#
# @keywords internal
mainCode <- function(Rmc,
snp,
kernel,
nullResult,
X,
pvMethod,
eps, ...) {
# rank factorization of kernel matrix
ZZ1 <- calcLocalKernel(Rmc = Rmc,
snp = snp,
kernel = kernel)
# influence function
psi <- .calcPsi(nullResult = nullResult, X = X, ZZ1 = ZZ1)
# eigen values of test statistic
ee <- tryCatch(expr = eigen(x = crossprod(x = psi)/nrow(x = snp),
only.values = TRUE),
error = function(e){
print(x = e$message)
stop("unable to obtain eigen decomposition")
})
# non-zero eigen values
nonzeroev <- ee$value[abs(x = ee$value) > 1e-10]
# p-value of observed test statistic
pvObs <- .calcPV(method = pvMethod,
psi = psi,
ev = nonzeroev)
# perturbed test statistics and p-values
pvResamp <- pvResampFunc(eps = eps,
psi = psi,
ev = nonzeroev,
pvMethod = pvMethod)
return( list("pvObs" = pvObs,
"pvResamp" = pvResamp) )
}
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