[R] R Large Dataset Problem

[Rainer M Krug]

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On 13/04/12 14:20, Milan Bouchet-Valat wrote:
> Le vendredi 13 avril 2012 à 04:32 -0700, efulas a écrit :
>> Dear All,
>> 
>> I have a problem with my data. First problem is that my data is really large and R is
>> omitting some columns from my data. Is there any way to read the whole data without
>> omitting.
> How did you import it? Please be precise.
> 
>> Another problem is that my data have 102k columns and each column have active or inactive
>> molecules. The data is like below
>> 
>> Molecul id
>> 
>> 129876            1010101110011110011110011100111100110.......... 234532
>> 1010101110011110011110011100111100110.......... 123678
>> 1010101110011110011110011100111100110.......... . . . . (102k values)
>> 
>> 
>> When i read the data in R. R define my rows as a "Inf" because R read it as a one number. I
>> want them to be seperated like "1  0   1   0" . Is there anyway to do this in R?
> See ?read.fwf. If you still have problems loading your data, feel free to ask again on specific
> issues.

You could also read them in so that the 1 and 0 are in one field and specify that this column is a
character, and then use strsplit() to split them up:

> x <- "1010101110011110011110011100111100110" strsplit(x, split="")
[[1]]
 [1] "1" "0" "1" "0" "1" "0" "1" "1" "1" "0" "0" "1" "1" "1" "1" "0" "0" "1" "1"
[20] "1" "1" "0" "0" "1" "1" "1" "0" "0" "1" "1" "1" "1" "0" "0" "1" "1" "0"



Cheers,

Rainer

> 
> 
> Regards
> 
> ______________________________________________ R-help at r-project.org mailing list 
> https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained,
> reproducible code.


- -- 
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology, UCT), Dipl. Phys.
(Germany)

Centre of Excellence for Invasion Biology
Stellenbosch University
South Africa

Tel :       +33 - (0)9 53 10 27 44
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