1、测试1 直接生成文件
> dir() character(0) > cat("aaa", "bbb", file = "test.txt") ## 直接生成文件 > dir() [1] "test.txt"
2、在文件上追加
> cat("1111", "222", file = "test.txt", append = T)
3、换行追加
> cat("mmm", "nnnn", "\n", file = "test.txt", append = T)
> cat("mmm", "nnnn", "\n", file = "test.txt", append = T)