[R] Add header line to large text file

[Wensui Liu]

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 <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)
> zev at zevross.com
>
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> and provide commented, minimal, self-contained, reproducible code.
>



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WenSui Liu
Blog   : statcompute.spaces.live.com
Tough Times Never Last. But Tough People Do.  - Robert Schuller