[R] question on write.table

[Peter Dalgaard]

Weiwei Shi <helprhelp at gmail.com> writes:

> 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?

If the only purpose is to write something that python can read, might
it not be more expedient to teach python some other data format that R
can generate easily? E.g. dump() or save(..., ascii=TRUE) ?
 
> 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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-- 
   O__  ---- Peter Dalgaard             Øster Farimagsgade 5, Entr.B
  c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
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