防止行名稱使用write.csv時

Question

命令到文件：

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

生成的文件：

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

我如何防止行索引第一列被寫入文件？

Answer 1

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

從?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.