In what way is the behavior non-consistent?  Quoting from
the help page for rep:

‘times’ A vector giving the number of times to repeat each
              element if of length ‘length(x)’, or to repeat the whole
              vector if of length 1.

‘each’ non-negative integer.  Each element of ‘x’ is repeated
              ‘each’ times.  Treated as ‘1’ if ‘NA’ or invalid.

So while times may be a vector, each is clearly limited to being an
integer.  I'll admit that it would be nice if it told you that it
was only using the first element of a vector each argument, but the
behaviour is perfectly consistent with the documentation.

                                        - Phil Spector
                                         Statistical Computing Facility
                                         Department of Statistics
                                         UC Berkeley
                                         spec...@stat.berkeley.edu



On Tue, 1 Feb 2011, T.D. Rudolph wrote:


I have a vector of unique elements that I want to replicate a variable number
of times depending on the element (lengths all > 800).  However I noticed
that the resulting length was not the sum of the each argument.  The
following example demonstrates this.

I am confused as to why this works:

rep(1:4, c(2,1,2,1))
[1] 1 1 2 3 3 4

but this doesn't:

rep(1:3, each=c(2,1,2))
[1] 1 1 2 2 3 3

This does not appear to be consistent with the description provided in
?rep....
Is this supposed to be happening?
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