使用write.csv时，防止将行名写入文件

命令：

t <- data.frame(v = 5:1, v2 = 9:5) write.csv(t, "t.csv") 

结果文件：

 # "","v","v2" # "1",5,9 # "2",4,8 # "3",3,7 # "4",2,6 # "5",1,5 

如何防止将行索引的第一列写入文件？

Answer 1

 write.csv(t, "t.csv", row.names=FALSE) 

从?write.csv ：

 row.names: either a logical value indicating whether the row names of 'x' are to be written along with 'x', or a character vector of row names to be written.