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










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