Re: [Rd] Col.names parameter in write.csv (PR#10411)

From: Peter Dalgaard <>
Date: Fri, 09 Nov 2007 11:23:35 +0100 wrote:
> Full_Name: Kingsley Oteng-Amoako
> Version: 2.5.1
> OS: Windows 5.1.2600 (Windows XP)
> Submission from: (NULL) (
> The col.names=false in the write.csv command does not work as documented.
> Attempting to write a vector to a csv file without column headers does not work
> as documented.
> The col.names=false feature on the write.table command does however work and it
> can thus be coerced into behaving like the write.csv command - which suggests
> that there is a simple error with the write.csv command code.
No, this is exacly as documented:

    'write.csv' and 'write.csv2' provide convenience wrappers for

     writing CSV files.  They set 'sep', 'dec' and 'qmethod', and
     'col.names' to 'NA' if 'row.names = TRUE' and 'TRUE' otherwise.
     These wrappers are deliberately inflexible: they are designed to
     ensure that the correct conventions are used to write a valid
     file. Attempts to change 'col.names', 'sep', 'dec' or 'qmethod'
     are ignored, with a warning.

(I forget whether the warning bit is new in 2.6.x, though)

   O__  ---- Peter Dalgaard             Ă˜ster Farimagsgade 5, Entr.B
  c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
 (*) \(*) -- University of Copenhagen   Denmark          Ph:  (+45) 35327918
~~~~~~~~~~ - (                  FAX: (+45) 35327907

______________________________________________ mailing list
Received on Fri 09 Nov 2007 - 10:28:59 GMT

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.2.0, at Fri 09 Nov 2007 - 10:30:16 GMT.

Mailing list information is available at Please read the posting guide before posting to the list.