[Rd] read.table bug in Mac OS X (PR#2469)

[Stefano Iacus]

Brian and George, with the following file

A.2	B	C
uno	10	100
due	20	200
tre	30	300
quattro	40	400
cinque	50	500
sei	60	600


which is tab-delim, saved as MacOS file (CR) I can read it with Darwin 
R (1.6.1) as follows

 > read.table("prova.txt",header=TRUE)
       A.2  B   C
1     uno 10 100
2     due 20 200
3     tre 30 300
4 quattro 40 400
5  cinque 50 500
6     sei 60 600
 > read.table("prova.txt")
        V1 V2  V3
1     A.2  B   C
2     uno 10 100
3     due 20 200
4     tre 30 300
5 quattro 40 400
6  cinque 50 500
7     sei 60 600

Can someone send me the critical files?
stefano


On Venerd́, gen 17, 2003, at 19:39 Europe/Rome, ripley@stats.ox.ac.uk 
wrote:

> George has supplied an example file which is CR-terminated.
>
> As far as I can see this is an error when using classic MacOS files on 
> an
> foreign OS, and is I presume about the Darwin port of R (confirmation
> please) where the native files are LF terminated and the example file 
> was
> CR terminated.
>
> It's a bit of a wonder that it ever worked, but it was broken in fixing
> PR#2396.  I've added a test example and a fix that covers this and
> PR#2396, and they will be in R-patched and R-devel shortly.
>
> It does make me wonder about the testing process: do the testers of the
> Darwin port never use classic MacOS files?
why should they?

>  How does emacs manage to
> create CR-terminated files on a unix-based OS?
there is a standard (unix)Emacs and a Carbon Emacs. The second one 
behaves as a "Classic" application under OSX, i.e. it is carbonized but 
does not use unix features almost like Carbon R.

> Or is this a case of using
> Carbon MacOS application with Darwin R, and that's rare?
>
I think so.
stefano

> On Fri, 17 Jan 2003 gwgilc@wm.edu wrote:
>
>> Full_Name: George W. Gilchrist
>> Version: 1.6.2
>> OS: OS X
>> Submission from: (NULL) (128.239.124.126)
>>
>>
>> Start with a tab-delimited or comma-delimited text file created on 
>> the Mac and
>> use read.table("filename.txt", header=T) to read it in. When the 
>> first column of
>> the file contains a character vector, and there is a header line, the 
>> first
>> letter of the first column of the fifth row is appended to the start 
>> of the
>> column name and is omitted from the data entry. See the example 
>> below. This
>> appears to have something to do with the way text files are encoded 
>> on the Mac.
>> Text flies created in Excel, emacs, Word, and TextEdit on OS X all 
>> seem to do
>> this, even when you copy the text file over to a PC and run R 1.6.2 
>> there under
>> Windows. If you open the Mac text file in a text editor on the PC and 
>> save it
>> under a different name, the problem goes away. I have tried this with 
>> a half
>> dozen different files.
>>
>>> tmp1<-read.table("deadFly.txt", header=T)
>>> tmp1[1:10,]
>>    VTrt Dead.X Dead.C Live.X Live.C N.X N.C P.Live.X P.Live.C
>> 1    Vg      2      0      7     10   9  10     0.78    1.000
>> 2    Vg      5      1      5      8  10   9     0.50    0.890
>> 3    Vg      0      0      8     10   8  10     1.00    1.000
>> 4    Vg      0      0      9      9   9   9     1.00    1.000
>> 5     g      1      1      9      7  10   8     0.90    0.875
>> 6    Vg      4      1      6      9  10  10     0.60    0.900
>> 7    Vg      2      1      7      9   9  10     0.78    0.900
>> 8    Vg      0      0      9      8   9   8     1.00    1.000
>> 9    Vg      0      0     10     10  10  10     1.00    1.000
>> 10   Vg      0      0      8      9   8   9     1.00    1.000
>>
>>> tmp2<-read.table("musselJen.txt", header=T)
>>> tmp2[1:10,]
>>    LLoc  Size ID Bac Sec    N   PC
>> 1    LS 120.0  1   T   1 32.7 92.0
>> 2    LS 120.0  1   T   2 33.3 92.5
>> 3    LS 120.0  1   T   3 39.3 96.9
>> 4    LS 120.0  2   T   1 36.1 94.3
>> 5     S 120.0  2   T   2 38.3 94.5
>> 6    LS 120.0  2   T   3 34.3 94.1
>> 7    LS 120.0  3   T   1 22.1 83.9
>> 8    LS 120.0  3   T   2 25.5 93.1
>> 9    LS 120.0  3   T   3 28.7 94.6
>> 10   LS   4.2  1   T   1 48.5 93.7
>>>
>>
>> ______________________________________________
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>>
>
> -- 
> Brian D. Ripley,                  ripley@stats.ox.ac.uk
> 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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