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