# rle

##### Run Length Encoding

Compute the lengths and values of runs of equal values in a vector -- or the reverse operation.

- Keywords
- manip

##### Usage

```
rle(x)
inverse.rle(x, …)
```# S3 method for rle
print(x, digits = getOption("digits"), prefix = "", …)

##### Arguments

- x
a vector (atomic, not a list) for

`rle()`

; an object of class`"rle"`

for`inverse.rle()`

.- …
further arguments; ignored here.

- digits
number of significant digits for printing, see

`print.default`

.- prefix
character string, prepended to each printed line.

##### Details

‘vector’ is used in the sense of `is.vector`

.

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.

##### Value

`rle()`

returns an object of class `"rle"`

which is a list
with components:

an integer vector containing the length of each run.

a vector of the same length as `lengths`

with the
corresponding values.

inverse.rle() returns an atomic vector.

##### Examples

`library(base)`

```
# NOT RUN {
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))
print(rle(z), prefix = "..| ")
N <- integer(0)
stopifnot(x == inverse.rle(rle(x)),
identical(N, inverse.rle(rle(N))),
z == inverse.rle(rle(z)))
# }
```

*Documentation reproduced from package base, version 3.4.3, License: Part of R 3.4.3*