From andy_liaw@merck.com  Thu Aug  8 13:02:44 2002
From: andy_liaw@merck.com (Liaw, Andy)
Date: Thu, 08 Aug 2002 08:02:44 -0400
Subject: read.table ignores first 5 lines (PR#1885)
Message-ID: <51F9C42DA15CD311BD220008C707D81906FFC55F@usrymx10.merck.com>

Prof. Ripley,

In that case, is it possible to check for such things and give an error in
read.table?  (Or perhaps warn against such misuse in the help file...)

Regards,
Andy

> -----Original Message-----
> From: ripley@stats.ox.ac.uk [mailto:ripley@stats.ox.ac.uk]
> Sent: Wednesday, August 07, 2002 4:26 PM
> To: Russell-Lenth@uiowa.edu
> Cc: r-devel@stat.math.ethz.ch; R-bugs@biostat.ku.dk
> Subject: Re: read.table ignores first 5 lines (PR#1885)
> 
> 
> stdin() from a terminal is not a file, nor is it a standard 
> connection.
> So this is not really a bug.
> 
> In particular, as used by you it does to have pushback.
> 
> On Wed, 7 Aug 2002 Russell-Lenth@uiowa.edu wrote:
> 
> > Full_Name: Russ Lenth
> > Version: 1.5.0
> > OS: Windows
> > Submission from: (NULL) (128.255.25.236)
> >
> >
> > If you use read.table with a connection to stdin(), the first
> > 5 lines of input seem not to be accepted.  See examples below.
> > Did NOT have the same problem with scan().
> >
> > > version
> >         _
> > platform i386-pc-mingw32
> > arch     i386
> > os       mingw32
> > system   i386, mingw32
> > status
> > major    1
> > minor    5.0
> > year     2002
> > month    04
> > day      29
> > language R
> >
> > > read.table(stdin(),head=T) -> junk
> > 1: a b c
> > 1: 1 2 3
> > 1: 4 5 6
> > 1: 7 8 9
> > 1: 10 11 12
> > 1: 13 14 15
> > 2: 16 17 18
> > 3: 19 20 21
> > 4: 22 23 24
> > 5:
> > > junk
> >    a  b  c
> > 1 13 14 15
> > 2 16 17 18
> > 3 19 20 21
> > 4 22 23 24
> >
> > > read.table(stdin()) -> junk
> > 1: 1 2 3
> > 1: 4 5 6
> > 1: 7 8 9
> > 1: 10 11 12
> > 1: 13 14 15
> > 1: 16 17 18
> > 2: 19 20 21
> > 3: 22 23 24
> > 4:
> > > junk
> >   V1 V2 V3
> > 1 16 17 18
> > 2 19 20 21
> > 3 22 23 24
> >
> > > junk <- scan()
> > 1: 4
> > 2: 5
> > 3: 6
> > 4: 7
> > 5: 8
> > 6: 9
> > 7:
> > Read 6 items
> >
> > > junk <- scan(stdin())
> > 1: 4
> > 2: 5
> > 3: 6
> > 4: 7
> > 5: 8
> > 6: 9
> > 7:
> > Read 6 items
> >
> >
> > 
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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 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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read.table ignores first 5 lines (PR#1885)
Liaw, Andy