[R] Add header line to large text file

[Zev Ross]

   Thanks to Wensui Liu and Jim Holtman for responses. Using sed was a good,
   quick (non-R) suggestion. Thanks! Zev
   Wensui Liu wrote:

if i were you, i probably will use 1 line of sed to do such task
instead of R to insert headers in the file.

On Thu, Apr 15, 2010 at 10:34 AM, Zev Ross [1]<zev at zevross.com> wrote:


All,

I have a 30 million record text file without header information. I would
like to add a header to this file without reading it first. Is this
possible? The code below does what I want except that the readLines portion
takes quite a long time. Is there a way around reading the lines? I'm
working on Windows XP.

Zev

input<-readLines("c:/junk/forR.csv")
input<-c(c('"a", "b", "c", "d", "e", "f"'), input)
writeLines(input, "c:/junk/forRfix.csv")

--
Zev Ross
ZevRoss Spatial Analysis
120 N Aurora, Suite 3A
Ithaca, NY 14850
607-277-0004 (phone)
866-877-3690 (fax, toll-free)
[2]zev at zevross.com

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--
Zev Ross
ZevRoss Spatial Analysis
120 N Aurora, Suite 3A
Ithaca, NY 14850
607-277-0004 (phone)
866-877-3690 (fax, toll-free)
[6]zev at zevross.com

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