View2 <- function(x){
    nc <- ncol(x[[1]])
    bound <- vector("list", 2*nc)
    bound[seq(from = 1, to = 2*nc, by = 2)] <- x[[1]]
    bound[seq(from = 2, to = 2*nc, by = 2)] <- x[[2]]
    names(bound)[seq(from = 1, to = 2*nc, by = 2)] <- paste0("1_", names(x[[1]]))
    names(bound)[seq(from = 2, to = 2*nc, by = 2)] <- paste0("2_", names(x[[1]]))
    View(bound)
}
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