From p.dalgaard at biostat.ku.dk  Sat May  9 14:00:13 2009
From: p.dalgaard at biostat.ku.dk (Peter Dalgaard)
Date: Sat, 09 May 2009 14:00:13 +0200
Subject: [Rd] unsplit list of data.frames with one column
In-Reply-To: <4A044B3D.7010506@vanderbilt.edu>
References: <4A044B3D.7010506@vanderbilt.edu>
Message-ID: <4A05704D.7080708@biostat.ku.dk>

Will Gray wrote:
> 
> Perhaps this is the intended behavior, but I discovered that unsplit 
> throws an error when it tries to set rownames of a variable that has no 
> dimension.  This occurs when unsplit is passed a list of data.frames 
> that have only a single column.
> 
> An example:
> 
> df <- data.frame(letters[seq(25)])
> fac <- rep(seq(5), 5)
> unsplit(split(df, fac), fac)
> 
> For reference, I'm using R version 2.9.0 (2009-04-17), subversion 
> revision 48333, on Ubuntu 8.10.
> 

That's a bug. The line

         x <- value[[1L]][rep(NA, len), ]

should be

         x <- value[[1L]][rep(NA, len), , drop=FALSE]


-- 
    O__  ---- Peter Dalgaard             ?ster Farimagsgade 5, Entr.B
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[Rd] unsplit list of data.frames with one column
Peter Dalgaard