[R] match problem by rownames

[Charilaos Skiadas]

As suggested in ?"[.data.frame", try:

dat[match('a1', rownames(dat)),]


Haris Skiadas
Department of Mathematics and Computer Science
Hanover College

On Sep 9, 2008, at 2:41 AM, Xianming Wei wrote:

> Hi all,
>
> While dat['a1',] and dat['a10',] produce the same results in the
> following example, I'd like dat['a1',] to return NAs.
>
> dat <- data.frame(x1 = paste(letters[1:5],10, sep=''), x2=rnorm(5))
> rownames(dat) <- dat$x1
> dat['a1',]
> dat['a10',]
>
>> sessionInfo()
> R version 2.7.2 (2008-08-25)
> i386-pc-mingw32
>
> locale:
> LC_COLLATE=English_Australia.1252;LC_CTYPE=English_Australia. 
> 1252;LC_MON
> ETARY=English_Australia.1252;LC_NUMERIC=C;LC_TIME=English_Australia. 
> 1252
>
> attached base packages:
> [1] stats     graphics  grDevices utils     datasets  methods   base
>
>
> other attached packages:
> [1] lattice_0.17-13
>
> loaded via a namespace (and not attached):
> [1] grid_2.7.2
>>
>
> Regards,
> Xianming
>