On Tue, Feb 22, 2011 at 7:43 AM, John Edwards <jhnedwards...@gmail.com> wrote:
> Hi,
>
> I have the following input file.
> $ cat main.txt
> CEL_A CELL_B
> 1 4
> 2 5
> 2 6
>
> Then I run read.table in R.
>
>> f=read.table('main.txt', header=T, check.names=F, sep='\t')
>> head(f)
> \ufeffCEL_A CELL_B
> 1 1 4
> 2 2 5
> 3 2 6
>> f$CEL_A
> NULL
>
> I'm not sure where the special character \ufeff comes from. Could anybody
> let me know what is the problem?
Looks like the Unicode character called 'byte order mark' (BOM), cf.
http://en.wikipedia.org/wiki/Byte_order_mark
It looks like your 'main.txt' text file was created by a software that
saves it as a Unicode-encoded text file. If you need a plain
old-style ASCII text file, see if you can resave it as such. With
last year's development in R, it also not unlikely that you can tell R
to read in the existing file by specifying the encoding, but since I
don't now how to do that I leave that as an search-the-help exercise
for you.
/Henrik
>
> Thanks,
> John
>
> [[alternative HTML version deleted]]
>
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