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2007 Mar 09
4
Using large datasets: can I overload the subscript operator?
...echnical details. So, my
questions are:
Has anyone ever made a similar extension, with virtual (lazy) arrays?
Can the suscript operator be overloaded like that in R? (I know it can be in
S, at least for vectors.)
And a tough one: is it possible to make an expression like "[1]" (without
quoutes) meaningful in R? At the moment it results in a syntax error. I
would like to make it return an object of a special class that gets
interpreted when subscripting my virtual array as "drop this dimension",
like this:
dataset [, 2, 3, drop = F] # Return a 3-dimensional array
dataset [, [2...