On Tue, Mar 29, 2011 at 06:58:59PM -0400, Dimitri Liakhovitski wrote:
> I have a tab-delimited .txt file (size 800MB) with about 3.4 million
> rows and 41 columns. About 15 columns contain strings.
> Tried to read it in in R 2.12.2 on a laptop that has Windows XP:
> mydata<-read.delim(file="FileName.TXT",sep="\t")
> R did not complain (!) and I got: dim(mydata) 1692063 41.
My guess would be that there are (unexpected) quotes and/or double quotes in
your
file and so R thinks that rather large blocks of your file are
actually very long strings. This routinely happens in situations like
this:
ID x description
1 0.4 my first measurement
2 1.6 Normal 5" object
3 0.4 Some measuremetn
4 0.7 A 4" long sample
R thinks that the description in row 2 ends in row 4 and you loose
data.
Try read.delim(..., quote="").
cu
Philipp
--
Dr. Philipp Pagel
Lehrstuhl für Genomorientierte Bioinformatik
Technische Universität München
Wissenschaftszentrum Weihenstephan
Maximus-von-Imhof-Forum 3
85354 Freising, Germany
http://webclu.bio.wzw.tum.de/~pagel/
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