Re: [R] question on write.table

From: Prof Brian Ripley <ripley_at_stats.ox.ac.uk>
Date: Fri 16 Dec 2005 - 18:36:08 EST

Note that write.table is very much faster in current versions of R. So you could save the object, read it into 2.2.1 (beta) and write it out there.

On Thu, 15 Dec 2005, Weiwei Shi wrote:

> Hi,
> I have a question on write.table:
> I have a data.frame called t7 as below:
>
>> dim(t7)
> [1] 14015184 6
>> t7[1:5,]
> uci uce par line graphical.forms stems
> 1 0 0 0 0 active activ
> 2 0 0 0 0 policy polici
> 3 0 0 0 0 wc PC
> 4 0 0 0 0 eff elf
> 5 0 0 0 0 icn ICC
>
> I want to write the contents of t7 into a file, which can be read
> later by a python program. So I used:
> write.table(t7,file="map")
>
> , which of course takes forever.
>
> Is there another way to make it finish in a standable time?
>
> I have to use old R version since I need to use ttda package.
>> version
> _
> platform x86_64-unknown-linux-gnu
> arch x86_64
> os linux-gnu
> system x86_64, linux-gnu
> status
> major 2
> minor 0.1
> year 2004
> month 11
> day 15

> language R
>
> My linux box has 8 G memory.
>
> Thank you for your help!
>
> Weiwei
> --
> Weiwei Shi, Ph.D
>
> "Did you always know?"
> "No, I did not. But I believed..."
> ---Matrix III
>
> ______________________________________________
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>

-- 
Brian D. Ripley,                  ripley@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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Received on Fri Dec 16 18:41:34 2005

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