[R] reading partial file content
Prof Brian Ripley
ripley at stats.ox.ac.uk
Fri Oct 8 09:56:52 CEST 2004
Please do not tack your question on to a different one (as the posting
guide does ask you not to).
On Fri, 8 Oct 2004, Marc Mamin wrote:
> I'd like to extract data from very large files (ca 1-2 Mio lines),
> and I already know which lines of these files I need.
> Is there a way to do it without filling the memory with the whole file
Yes, several, and it has been discussed on this list on Wednesday, in a
`Performing Analysis on Subset of External data'
Please look in the archives.
> The lines I need are randomly distributed within the files.
[irrelevant other message discarded here.]
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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