Try this also:

m1[as.logical(rowSums(matrix(m1 %in% m2, ncol = ncol(m1)))),]

On Mon, Jul 20, 2009 at 5:09 PM, Alberto Lora M <albertoloram@gmail.com>wrote:

> Hi could you yelp me please with this
>
> Suppose that we have the following matrix
>
> m1<-matrix(c("a","7","a","i","o","u","i","1","2","3","4","5","6","7"),
> ncol=2)
> m1
>     [,1] [,2]
> [1,] "a"  "1"
> [2,] "7"  "2"
> [3,] "a"  "3"
> [4,] "i"  "4"
> [5,] "o"  "5"
> [6,] "u"  "6"
> [7,] "i"  "7"
> m2<-c("a","7")
> I need to obtain all the rows in m1 in which m2 the elements of m2 are
> present
>     [,1] [,2]
> [1,] "a"  "1"
> [2,] "7"  "2"
> [3,] "a"  "3"
> [7,] "i"  "7"
>
> Thx again
>
>
> --
> Alberto Lora Michiels
> Rue du Progrčs,  6B
> 7860 Lessines
> GSM 32(0)496659457
>
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>
>
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>
>


-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O

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