Prevent row names to be written to file when using write csv

Question

Commands   t  lt - data frame v   5 1  v2   9 5  write csv t   t csv     Resulting file         v   v2     1  5 9    2  4 8    3  3 7    4  2 6    5  1 5   How do I prevent first column with row index from being written to the file

User · Accepted Answer

write csv t   t csv   row names FALSE    From  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

User · Answer

For completeness  write csv   from the readr package is faster and never writes row names    install packages  readr   dependencies   TRUE  library readr  write csv t   t csv     If you need to write big data out  use fwrite   from the data table package  It s much faster than both write csv and write csv     install packages  data table   library data table  fwrite t   t csv     Below is a benchmark that Edouard published on his site  microbenchmark write csv data   baseR file csv   row names   F                  write csv data   readr file csv                   fwrite data   datatable file csv                   times   10  unit    s       Unit  seconds                                                 expr        min         lq       mean     median         uq        max neval     write csv data   baseR file csv   row names   F  13 8066424 13 8248250 13 9118324 13 8776993 13 9269675 14 3241311    10                    write csv data   readr file csv    3 6742610  3 7999409  3 8572456  3 8690681  3 8991995  4 0637453    10                   fwrite data   datatable file csv    0 3976728  0 4014872  0 4097876  0 4061506  0 4159007  0 4355469    10

[r] Prevent row names to be written to file when using write.csv

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