On 04/02/2011 5:35 AM, Christian Ruckert wrote:
To me it seems like writeBin() writes one char/byte more than expected.
You want writeChar rather than writeBin to avoid the null termination of
strings.
Duncan Murdoch
> con<- file("testbin", "wb")
> writeBin("ttccggaa", con)
> close(con)
> con<- file("testbin", "rb")
> readBin(con, what="character")
[1] "ttccggaa"
> seek(con, what=NA)
[1] 9
> close(con)
> con<- file("testbin", "rb")
> readBin(con, what="raw", n=20)
[1] 74 74 63 63 67 67 61 61 00
> seek(con, what=NA)
[1] 9
> close(con)
As the numbering starts with 0 the position should be 8 and not 9 after
reading. There were two older threads which look very similar to my problem:
http://tolstoy.newcastle.edu.au/R/e2/devel/06/11/1119.html
http://r.789695.n4.nabble.com/Re-Problem-reading-binaries-created-with-fortran-More-infos-td974396.html
Thanks in advance,
Christian
> sessionInfo()
R version 2.12.0 (2010-10-15)
Platform: x86_64-pc-linux-gnu (64-bit)
locale:
[1] C
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] Biostrings_2.18.2 IRanges_1.8.8
loaded via a namespace (and not attached):
[1] Biobase_2.10.0
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