[R] subscript data.frame

[Prof Brian Ripley]

> From: "Jens Oehlschlägel-Akiyoshi" <jens.oehlschlaegel-akiyoshi at mdfactory.de>
> 
> is the following difference intended?
> 
> > ddd <- data.frame(a=1:3, b=1:3)
> 
> # assignment of 'X' silently ignored
> > ddd[1,1] <- 'X'
> > is.factor(ddd[[1]])
> [1] FALSE
> > ddd
>   a b
> 1 1 1
> 2 2 2
> 3 3 3
> 
> # assignment of 'X' not ignored
> > ddd[[1]][1] <- 'X'
> > is.factor(ddd[[1]])
> [1] TRUE
> > ddd
>   a b
> 1 X 1
> 2 2 2
> 3 3 3

It's a bug: the prototype has the second behaviour for both.  Could you put it
in as a bug report please?

-- 
Brian D. Ripley,                  ripley at 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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