| rle {base} | R Documentation |
Compute the lengths and values of runs of equal values in a vector – or the reverse operation.
rle(x) inverse.rle(x, ...)
x |
an atomic vector for rle(); an object of class
"rle" for inverse.rle(). |
... |
further arguments which are ignored in R. |
Missing values are regarded as unequal to the previous value, even if that is also missing.
inverse.rle() is the inverse function of rle(),
reconstructing x from the runs.
rle() returns an object of class "rle" which is a list
with components:
lengths |
an integer vector containing the length of each run. |
values |
a vector of the same length as lengths with the
corresponding values. |
inverse.rle() returns an atomic vector.
x <- rev(rep(6:10, 1:5))
rle(x)
## lengths [1:5] 5 4 3 2 1
## values [1:5] 10 9 8 7 6
z <- c(TRUE,TRUE,FALSE,FALSE,TRUE,FALSE,TRUE,TRUE,TRUE)
rle(z)
rle(as.character(z))
stopifnot(x == inverse.rle(rle(x)),
z == inverse.rle(rle(z)))