Hi,
If you check ?str()
str(zseq)
#List of 6
# $ : int [1:19] 1 2 3 4 5 6 7 8 9 10 ...
# $ : int [1:20] 1 2 3 4 5 6 7 8 9 10 ...
# $ : int [1:21] 1 2 3 4 5 6 7 8 9 10 ...
# $ : int [1:22] 1 2 3 4 5 6 7 8 9 10 ...
# $ : int [1:23] 1 2 3 4 5 6 7 8 9 10 ...
# $ : int [1:24] 1 2 3 4 5 6 7 8 9 10 ...
# - attr(*, "dim")= int [1:2] 2 3
Can access each list element by:
zseq[[1]]
# [1]? 1? 2? 3? 4? 5? 6? 7? 8? 9 10 11 12 13 14 15 16 17 18 19
#Integer is the class and 19, 20, 21,... are the total number of elements
? lapply(zseq,unlist)
[[1]]
?[1]? 1? 2? 3? 4? 5? 6? 7? 8? 9 10 11 12 13 14 15 16 17 18 19
[[2]]
?[1]? 1? 2? 3? 4? 5? 6? 7? 8? 9 10 11 12 13 14 15 16 17 18 19 20
[[3]]
?[1]? 1? 2? 3? 4? 5? 6? 7? 8? 9 10 11 12 13 14 15 16 17 18 19 20 21
[[4]]
?[1]? 1? 2? 3? 4? 5? 6? 7? 8? 9 10 11 12 13 14 15 16 17 18 19 20 21 22
[[5]]
?[1]? 1? 2? 3? 4? 5? 6? 7? 8? 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
[[6]]
?[1]? 1? 2? 3? 4? 5? 6? 7? 8? 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
A.K.
----- Original Message -----
From: David Epstein <David.Epstein at warwick.ac.uk>
To: r-help at r-project.org
Cc:
Sent: Monday, September 2, 2013 11:42 AM
Subject: [R] Meaning of "Integer,19"
I tried example('apply'). Among the various examples, there was the
following:
apply> z <- array(1:24, dim = 2:4)
apply> zseq <- apply(z, 1:2, function(x) seq_len(max(x)))
apply> zseq? ? ? ? ## a 2 x 3 matrix
? ? [,1]? ? ? [,2]? ? ? [,3]
[1,] Integer,19 Integer,21 Integer,23
[2,] Integer,20 Integer,22 Integer,24
The entry "Integer,19" seems to mean the list of integers [1:19],
though I'm just guessing. Possibly it means some list of 19 integers.
Questions:
Is the notation "Integer,19" documented somewhere? I can't find
it.
How might one proceed to find out the meaning of this notation if one didn't
know it before?
The actual substance of my question is a request for advice on how, in general,
to look for documentation in R.
I know about help.start(), help.search() and RSiteSearch(). Also, I know how to
search the archives of r-help. Are there other methods of searching R that I
should try?
Usually I get more hits than I can cope with.
Thanks
??? [[alternative HTML version deleted]]
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