I realize I didn't give a solution:
scan(con, "", sep="\n")
should do it.
On Sun, 20 Apr 2008, Prof Brian Ripley wrote:
> On Sun, 20 Apr 2008, Stephen Eglen wrote:
>
>> Hi,
>>
>> I have some text files that do not have trailing \n on the last
>> (incomplete) line; how do I read in the last line?
>>
>> e.g. here is a test case: [linux + R version 2.6.1 (2007-11-26) ]
>>
>>
>> z <- gzfile("short.gz", open="w")
>> cat("7\n5\n3", file=z)
>> close(z)
>>
>> z <- gzfile('short.gz')
>> readLines(z)
>>
>> [1] "7" "5"
>>
>> readLines would indicate that for blocking connections (which I assume
>> this is), the last line (containing 3) would be read in, and a warning
>> would be generated. I get the desired behaviour if I use a file() on
>> a file that is not compressed:
>>
>> y <- file("short", open="w")
>> cat("7\n5\n3", file=y)
>> close(y)
>>
>> y <- file('short')
>> readLines(y)
>>
>> [1] "7" "5" "3"
>> Warning message:
>> In readLines(y) : incomplete final line found on 'short'
>>
>> What am I missing?
>
> gzfile is not a text-mode connection, and the help is wrong for those.
> E.g.
>
>> readLines(pipe("gzip -dc short.gz"))
> [1] "7" "5"
>
> does the same. It is only text-mode blocking connections which do this.
>
> (I just looked at the code, and you might have found that illuminating.)
--
Brian D. Ripley, [EMAIL PROTECTED]
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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