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possibilitie
2012 May 01
3
Data frame vs matrix quirk: Hinky error message?
AdvisoRs:
Is the following a bug, feature, hinky error message, or dumb Bert?
> mtest <- matrix(1:12,nr=4)
> dftest <- data.frame(mtest)
> ix <- cbind(1:2,2:3)
> mtest[ix] <- NA
> mtest
[,1] [,2] [,3]
[1,] 1 NA 9
[2,] 2 6 NA
[3,] 3 7 11
[4,] 4 8 12
## But ...
> dftest[ix] <- NA
Error in `[<-.data.frame`(`*tmp*`, ix, value