sub_seq function

Find sub-sequences of identical elements in a vector.

subSeq(x, item = NULL)

sub_seq(x, item = NULL)

is_grouped(x)

rle2(x)

Arguments

• x: An atomic vector or a factor.
• item: Optionally a specific value to look for in x.

Returns

A dataframe.

Details

• sub_seq is synonymous with subSeq
• rle2 is identical to rle (from base) but rle2 works on factors as input (a factor is coerced to character).
• is_grouped checks if the values in x are clustered into the smallest number of clusters.

Examples

x <- c(1, 1, 1, 0, 0, 1, 1, 1, 2, 2, 2, 1, 2, 2, 2, 3)
(ans <- subSeq(x))
ans$value

## Notice: Same results below
subSeq(x, item=1)
subSeq(x, item="1")

xc <- as.character(x)
(ans<-subSeq(xc))
ans$value

## Notice: Same results below
subSeq(xc, item="1")
subSeq(xc, item=1)

is_grouped(x)
is_grouped(sort(x))
is_grouped(xc)
is_grouped(sort(xc))

See Also

rle

Author(s)

Søren Højsgaard, sorenh@math.aau.dk