Nothing
beta.bsreg <- function(target, dataset, threshold = 0.05, wei = NULL) {
threshold <- log(threshold)
dm <- dim(dataset)
if ( is.null(dm) ) {
n <- length(target)
p <- 1
} else {
n <- dm[1] ## sample size
p <- dm[2] ## number of variables
}
if ( p > n ) {
res <- paste("The number of variables is hiher than the sample size. No backward procedure was attempted")
} else {
tic <- proc.time()
##################################
# target checking and initialize #
##################################
ini <- beta.reg( target, dataset, wei = wei )
dofini <- length( ini$be )
likini <- ini$loglik
stat <- dof <- numeric(p)
if (p == 1) {
if ( is.null(wei) ) {
mod <- Rfast::beta.mle(target)
} else mod <- betamle.wei(target, wei)
stat <- 2 * ( likini - mod$loglik )
dof <- dofini - length( mod$be )
pval <- pchisq( stat, dof, lower.tail = FALSE, log.p = TRUE)
} else {
for (j in 1:p) {
mod <- beta.reg( target, dataset[, -j], wei = wei )
stat[j] <- 2 * ( likini - mod$loglik )
dof[j] <- dofini - length( mod$be )
}
}
mat <- cbind(1:p, pchisq( stat, dof, lower.tail = FALSE, log.p = TRUE), stat )
colnames(mat) <- c("variable", "log.p-value", "statistic" )
rownames(mat) <- 1:p
sel <- which.max( mat[, 2] )
info <- matrix( c(0, -10, -10) , ncol = 3 )
if ( mat[sel, 2] < threshold ) {
runtime <- proc.time() - tic
res <- list(runtime = runtime, info = matrix(0, 0, 3), mat = mat, ci_test = "testIndBeta", final = ini )
} else {
info[1, ] <- mat[sel, ]
mat <- mat[-sel, , drop = FALSE]
dat <- dataset[, -sel, drop = FALSE ]
i <- 1
while ( info[i, 2] > threshold & dim(dat)[2] > 0 ) {
ini <- beta.reg( target, dat, wei = wei )
likini <- ini$loglik
dofini <- length(ini$be)
i <- i + 1
k <- p - i + 1
if ( k == 1 ) {
if ( is.null(wei) ) {
mod <- Rfast::beta.mle(target)
} else mod <- betamle.wei(target, wei)
stat <- 2 * ( likini - mod$loglik )
dof <- dofini - length( mod$be )
pval <- pchisq( stat, dof, lower.tail = FALSE, log.p = TRUE)
if (pval > threshold ) {
final <- "No variables were selected"
info <- rbind(info, c(mat[, 1], pval, stat) )
dat <- dataset[, -info[, 1], drop = FALSE ]
mat <- NULL
} else {
info <- rbind(info, c(0, -10, -10))
final <- ini
mat[, 2:3] <- c(pval, stat)
}
} else {
stat <- dof <- numeric(k)
for (j in 1:k) {
mod <- beta.reg( target, dat[, -j], wei = wei )
stat[j] <- 2 * ( likini - mod$loglik )
dof[j] <- dofini - length( mod$be )
}
mat[, 2:3] <- cbind( pchisq( stat, dof, lower.tail = FALSE, log.p = TRUE), stat )
sel <- which.max( mat[, 2] )
if ( mat[sel, 2] < threshold ) {
final <- ini
info <- rbind(info, c(0, -10, -10) )
} else {
info <- rbind(info, mat[sel, ] )
mat <- mat[-sel, , drop = FALSE]
dat <- dataset[, -info[, 1], drop = FALSE ]
}
}
}
runtime <- proc.time() - tic
info <- info[ info[, 1] > 0, , drop = FALSE]
res <- list(runtime = runtime, info = info, mat = mat, ci_test = "testIndBeta", final = final )
}
}
res
}
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