R: Run Length Encoding

Run Length Encoding

rle(x)

x a vector.

Compute the lengths and values of runs of equal values in a vector.

A list with components

`lengths`	a vector containing the length of each run.
`values`	a vector of the same length as `lengths` with the corresponding values.

x <- rev(rep(6:10, 1:5))
rle(x)
## $lengths
## [1] 5 4 3 2 1
## $values
## [1] 10  9  8  7  6