rep mereplikasi nilai dalam x. Ini adalah fungsi umum, dan metode default (internal) dijelaskan di sini. rep.int dan rep_len adalah versi sederhana yang lebih cepat untuk dua kasus umum. Secara internal, mereka bersifat generik, sehingga metode dapat ditentukan untuk mereka.
rep(x, …)<p></p><p>rep.int(x, times)</p><p>rep_len(x, length.out)</p>| Parameter | Deskripsi |
|---|---|
x |
a vector (of any mode including a list) or a factor or (for rep only) a POSIXct or POSIXlt or Date object; or an S4 object containing such an object. |
… |
further arguments to be passed to or from other methods. For the internal default method these can include: timesan integer-valued vector giving the (non-negative) number of times to repeat each element if of length length(x), or to repeat the whole vector if of length 1. Negative or NA values are an error. A double vector is accepted, other inputs being coerced to an integer or double vector. length.outnon-negative integer. The desired length of the output vector. Other inputs will be coerced to a double vector and the first element taken. Ignored if NA or invalid. eachnon-negative integer. Each element of x is repeated each times. Other inputs will be coerced to an integer or double vector and the first element taken. Treated as 1 if NA or invalid. |
times, length.out |
see … above. |
# NOT RUN {
rep(1:4, 2)
rep(1:4, each = 2) # not the same.
rep(1:4, c(2,2,2,2)) # same as second.
rep(1:4, c(2,1,2,1))
rep(1:4, each = 2, len = 4) # first 4 only.
rep(1:4, each = 2, len = 10) # 8 integers plus two recycled 1's.
rep(1:4, each = 2, times = 3) # length 24, 3 complete replications
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)
# date-time objects
x <- .leap.seconds[1:3]
rep(x, 2)
rep(as.POSIXlt(x), rep(2, 3))
## named factor
x <- factor(LETTERS[1:4]); names(x) <- letters[1:4]
x
rep(x, 2)
rep(x, each = 2)
rep.int(x, 2) # no names
rep_len(x, 10)
# }