rep {base} | R Documentation |
rep
replicates the values in x
according to the values given in times
and length.out
.
rep(x, times, length.out)
x |
a vector (of any mode including a list) or a pairlist. |
times |
integer. A vector giving the number of times to repeat
each element. Either of length 1 or length(x) . |
length.out |
integer. (Optional.) The desired length of the output vector. |
If times
consists of a single integer,
the result consists of the values in
x
repeated this many times.
If times
is a vector of the same length as
x
, the result consists of x[1]
repeated times[1]
times,
x[2]
repeated times[2]
times and so on.
length.out
may be given in place of times
,
in which case x
is repeated as many times as is
necessary to create a vector of this length. If both
length.out
and times
are specified, times
determines the replication, and length.out
can be used to
truncate the output vector (or extend it by NA
s).
Non-integer values of times
will be truncated towards zero.
If times
is a computed quantity it is prudent to add a small fuzz.
If the original vector has names, these are also replicated and so will almost always contain duplicates.
rep(1:4, 2) rep(1:4, c(2,2,2,2)) # same as above, length 8. rep(1:4, c(2,1,2,1)) rep(1:4, c(2,2,2,2), 4) # first 4 only. rep(1:4, c(2,2,2,2), 10) # 8 intgers plus two NAs rep(1, 40*(1-.8)) # length 7 on most platforms rep(1, 40*(1-.8)+1e-7) # better ## replicate a list fred <- list(happy = 1:10, name = "squash") rep(fred, 5)