小编src*_*471的帖子

我有一个向量, myvector <- c("a","b","c","cat","4","dog","cat","f").我想选择那些紧跟在包含字符串"cat"的元素之后的元素.

即,我想myvector2只包含"4"和"f".我不知道从哪里开始.