R 按正确顺序组合两个向量

我有两个向量，例如：

  v1 <- c("a","j","d")
  v2 <- c("book","tree","river")

但顺序是错误的

谢谢您的帮助。

v1
c（rbind（v1，v2））
v1 <- c("a","j","d")
v2 <- c("book","tree","river")
c(rbind(v1,v2))
# [1] "a"     "book"  "j"     "tree"  "d"     "river"

  c(v1,v2)

v1 <- c("a","j","d")
v2 <- c("book","tree","river")
c(rbind(v1,v2))
# [1] "a"     "book"  "j"     "tree"  "d"     "river"