On May 7, 2005, at 2:59 PM, Vadim Ogranovich wrote:
But then mylist is not a list:
x <- new("mylist", x = list(x = 1, y = 2)) x[[1]]
Error in x[[1]] : subscript out of bounds
This is probably solvable by a sprinkle of setIs or setAs spells, but each time I get into the S4 area I feel walking a mine-field.
Well, then you can still use S3: x <- list(x=1:5, y=5:1) class(x) <- "mylist" dim.mylist <- function(l) c(length(l[[1]]),length(l)) dim(x) [1] 5 2 x[[1]] [1] 1 2 3 4 5 is.list(x) [1] TRUE
I'm not saying it's a good idea, because you can still break other things if you're not careful, but it's possible... If all you want is writing convenience functions for lists, that's fine, but I don't think you can replace data frames with such objects easily ...
Cheers, Simon
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