Rename objects in environment r

Question

I'd like to rename objects in environment r. For example, y1 <- vector('list', 3) x1 <- matrix(0, 3, 3) x2 <- matrix(1, 3, 3) x3 <- matrix(2, 3, 3) y1[[1]] <- x1 y1[[2]] <- x2 y1[[3]] <- x3 y2 <- vector('list', 3) y2[[1]] <- x1 y2[[2]] <- x2 y2[[3]] <- x3 y <- new.env() y$y1 <- y1 y$y2 <- y2 names(y) names(y) <- c('a', 'b') I expected that the name of lists inside y was a and b, that is, names(y) equals c('a', 'b'), Obs.: I can't rename manually the variables y1 and y2, I need to change them inside the environment. JavaScript questions and answers, JavaScript questions pdf, JavaScript question bank, JavaScript questions and answers pdf, mcq on JavaScript pdf, JavaScript questions and solutions, JavaScript mcq Test , Interview JavaScript questions, JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)

Answer 1

R doesn't really have a built in operation to rename variables in any environment. YOu could write a simple helper function to do that. env_rename <- function(e, new_names, old_names = names(e)) { stopifnot(length(new_names)==length(old_names)) orig_val <- mget(old_names, envir=e) rm(list=old_names, envir=e) for(i in seq_along(old_names)) { assign(new_names[i], orig_val[[i]], envir=e) } } and call that with env_rename(y, c("a","b"))