Using the IRanges package from Bioconductor and somewhat recent R-2.9.1.
ov = IRanges(1:3, 4:6)
length(ov) # 3
seq(along = ov) # 1 2 3 as wanted
seq_along(ov) # 1!
I had expected that the last line would yield 1:3. My guess is that
somehow seq_along don't utilize that ov is an S4 class with a length
method.
The last line of the *Details* section of ?seq has a typeo. Currently
it is
'seq.int', 'seq_along' and 'seq.int' are primitive: the latter two
ignore any argument name.
I would guess it ought to be
'seq.int', 'seq_along' and 'seq_len' are primitive: the latter two
ignore any argument name.
Kasper
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