[R] Extract from matrix

[Henrique Dallazuanna]

Try also:

mat[mat==29] <- NA

On 15/02/2008, _Fede_ <r_stat_solutions at hotmail.es> wrote:
>
>  Hi all.
>
>  I have certain problem with the extraction of data from matrices. I know how
>  extract elements from a matrix, but what I would like to do is to extract a
>  concrete number, not an element. For example if I have this matrix X:
>
>      [,1] [,2] [,3] [,4]
>  [1,]    3   13   23   33
>  [2,]    9   19   29   39
>  [3,]   10   20   30   40
>
>  I can do X[-2] or X[2] in order to eliminate the element of the matrix or to
>  extract it, respectively.
>
>  But, what I need is to extract or to eliminate a value of the matrix. For
>  example the 29.
>
>  Can I do this? How?
>
>  Thanks for the help.
>  --
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>
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>


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