Nothing
boot.logit.env <- function(X, Y, u, B) {
X <- as.matrix(X)
Y <- as.matrix(Y)
a <- dim(Y)
n <- a[1]
r <- a[2]
p <- ncol(X)
bootenv <- function(i) {
sam <- sample(1:n, n, replace = T)
Y.boot <- Y[sam]
X.boot <- X[sam, ]
return(c(logit.env(X.boot, Y.boot, u, asy = F)$beta))
}
bootbeta <- lapply(1:B, function(i) bootenv(i))
bootbeta <- matrix(unlist(bootbeta), nrow = B, byrow = TRUE)
bootse <- matrix(apply(bootbeta, 2, stats::sd), nrow = p)
return(bootse)
}
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