用R中的单词拆分字符串

Question

我想用两个单词分割一个字符串:

s <- "PCB153 treated HepG2 cells at T18"
strsplit(s, split = <treated><at>)

我应该写什么而不是<>？

我会得到:

"PCB153" "HepG2 cells" "T18"

Answer 1

strsplit(s, split="treated|at")
#[[1]]
#[1] "PCB153 "       " HepG2 cells " " T18"