You can do
> A <- HairEyeColor
> do.call("[", c(list(A),list(1,T,T)))
Sex
Eye Male Female
Brown 32 36
Blue 11 9
Hazel 10 5
Green 3 2
Regards
Søren
________________________________________
Fra: [email protected] [[email protected]] På vegne
af Steve Jaffe [[email protected]]
Sendt: 4. august 2009 21:23
Til: [email protected]
Emne: [R] array slice notation?
Suppose I have an n-diml array A and I want to extract the first "row" -- ie
all elements A[1, ...]
Interactively if I know 'n' I can write A[1,,,,,] with (n-1) commas.
How do I do the same more generally, eg in a script?
(I can think of doing this by converting A to a vector then extracting the
approp elements then reshaping it to an array, but I wonder if there isn't a
more straightforward approach)
Thanks
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