[R] Delete rows from matrix having at least one zero value
mentor_
mentor_ at gmx.net
Sun Nov 9 14:30:56 CET 2008
Have found a solution:
matrix[rowSums(matrix == 0) == 0, ]
mentor_ wrote:
>
> Hi,
>
> I have a further question about matrix manipulation.
>
> Imagine the following two matrices:
>> test
> [,1] [,2] [,3] [,4]
> [1,] 1 0 6 4
> [2,] 2 5 7 5
> [3,] 3 6 8 6
> [4,] 4 0 0 0
>
>> matrix(is.element(test,0), ncol=4)
> [,1] [,2] [,3] [,4]
> [1,] FALSE TRUE FALSE FALSE
> [2,] FALSE FALSE FALSE FALSE
> [3,] FALSE FALSE FALSE FALSE
> [4,] FALSE TRUE TRUE TRUE
>
> How can I apply the TRUE FALSE matrix to the 'test' matrix so that all
> rows
> having at least one zero value will be thrown out.
>
> So after applying the TRUE FALSE matrix the test matrix shoud look like
> the following:
> [,1] [,2] [,3] [,4]
> [1,] 2 5 7 5
> [2,] 3 6 8 6
>
> Cheers
>
--
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