Try this:
a[a[,3] < 6,, drop = FALSE]
On Fri, Sep 3, 2010 at 10:08 AM, syrvn <ment...@gmx.net> wrote:
>
> Hi,
>
> the R code:
>
> a <-
> matrix(c(1,5,4,3,7,10,34,4,3,8,6,5,12,17,45,3,2,45,46,47,3,4,22,12,21),
> nrow=5)
> rownames(a) <- c("a","b","c","d","e")
> a
> a[which(a[,3] < 8), ]
> a[which(a[,3] < 6), ]
>
>
> produces the following output:
>
> > a
> [,1] [,2] [,3] [,4] [,5]
> a 1 10 6 3 3
> b 5 34 5 2 4
> c 4 4 12 45 22
> d 3 3 17 46 12
> e 7 8 45 47 21
>
> > a[which(a[,3] < 8), ]
> [,1] [,2] [,3] [,4] [,5]
> a 1 10 6 3 3
> b 5 34 5 2 4
>
> > a[which(a[,3] < 6), ]
> [1] 5 34 5 2 4
>
>
> I actually thought it must be rather easy to somehow extract the row name
> when the result is just a vector as in the second example and not a matrix.
> I tried several ways but without any success.
>
> Any advice?
> Best,
> syrvn
>
>
> --
> View this message in context:
> http://r.789695.n4.nabble.com/how-to-get-row-name-of-matrix-when-result-is-a-vector-tp2525631p2525631.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
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> PLEASE do read the posting guide
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>
--
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O
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