Didn't you notice the difference between Sundar's code and yours? Sundar put the data.frame name before the column name while you did not do so in your check step.

--
DW


On Nov 16, 2009, at 8:07 AM, A Singh wrote:

Oh, strange!

I thought it might be a problem with the 'base' package installation, because the same thing's worked for me too before but won't do now.

I tried to reinstall it (base), but R says its there already which I expected it to be anyway.

I don't quite know where the issue is. Very odd.


--On 16 November 2009 04:59 -0800 Sundar Dorai-Raj <sdorai...@gmail.com > wrote:

Works for me:

x <-
read.csv(url("http://dc170.4shared.com/download/153147281/a5c78386/Testvc
omp10.csv?tsid=20091116-075223-c3093ab0")) names(x)
x[2:13] <- lapply(x[2:13], factor)

levels(x$P1L55)
[1] "0" "1"
is.factor(x$P1L96)
[1] TRUE

sessionInfo()
R version 2.10.0 (2009-10-26)
i386-apple-darwin9.8.0

locale:
[1] en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

other attached packages:
[1] lattice_0.17-26

loaded via a namespace (and not attached):
[1] grid_2.10.0  tools_2.10.0

On Mon, Nov 16, 2009 at 4:50 AM, A Singh <aditi.si...@bristol.ac.uk>
wrote:
Sorry, my file is at:


http://www.4shared.com/file/153147281/a5c78386/Testvcomp10.html


----------------------
A Singh
aditi.si...@bristol.ac.uk
School of Biological Sciences
University of Bristol

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----------------------
A Singh
aditi.si...@bristol.ac.uk
School of Biological Sciences
University of Bristol

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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.

David Winsemius, MD
Heritage Laboratories
West Hartford, CT

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