[R] mark values as NA in matrix

[Petr Pikal]

Hi

there is not much to evaluate what you actually want 

mymatrix[1,2] <- NA

changes respective value in row1 and col2 to NA

or

which(is.na(mymatrix), arr.ind=T)

gives you positions of NA in mymatrix.

HTH
Petr

 

On 21 Sep 2005 at 20:07, MK wrote:

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Petr Pikal
petr.pikal at precheza.cz