seq2: Sequence Generation

In ArcadeAntics/essentials: Essential Functions not Included in Base R

Sequence Generation

Description

Generate regular sequences.

Usage

seq2(from, to, by, length.out, along.with, endpoint, ...)

Arguments

from, to	the starting and (maximal) end values of the sequence. Of length 1 unless just from is supplied.
by	number: increment of the sequence.
length.out	desired length of the sequence. A negative number will return a zero-length array, while a non-negative number will be rounded up if fractional.
along.with	take the length from the length of this argument.
endpoint	if the last element of the result is equal to to, should it be kept?
...	unused, to match the signature of seq.default and seq.int.

Details

A negative length.out will return a zero-length array, unlike seq where an error would be raised.

Additionally, specifying to - from and by of opposite signs will return a zero-length array, unlike seq where an error would be thrown.

Value

A vector of type "integer" or "double".

Examples

seq2(from =  26, endpoint = TRUE )
seq2(from =  26, endpoint = FALSE)
seq2(from =   0, endpoint = TRUE )
seq2(from =   0, endpoint = FALSE)
seq2(from = -26, endpoint = TRUE )
seq2(from = -26, endpoint = FALSE)


seq2(from = letters, endpoint = TRUE )
seq2(from = letters, endpoint = FALSE)


seq2(to =  26, endpoint = TRUE )
seq2(to =  26, endpoint = FALSE)
seq2(to = -24, endpoint = TRUE )
seq2(to = -24, endpoint = FALSE)


seq2(by =  26, endpoint = TRUE )
seq2(by =  26, endpoint = FALSE)
seq2(by =   0, endpoint = TRUE )
seq2(by =   0, endpoint = FALSE)
seq2(by = -26, endpoint = TRUE )
seq2(by = -26, endpoint = FALSE)


seq2(length.out =  26, endpoint = TRUE )
seq2(length.out =  26, endpoint = FALSE)
seq2(length.out =   0, endpoint = TRUE )
seq2(length.out =   0, endpoint = FALSE)
seq2(length.out = -26, endpoint = TRUE )
seq2(length.out = -26, endpoint = FALSE)


seq2(along.with = letters, endpoint = TRUE )
seq2(along.with = letters, endpoint = FALSE)





seq2(from =  1, to = 26, endpoint = TRUE )
seq2(from =  1, to = 26, endpoint = FALSE)
seq2(from = 26, to =  1, endpoint = TRUE )
seq2(from = 26, to =  1, endpoint = FALSE)


seq2(from =  26, by =  1, endpoint = TRUE )
seq2(from =  26, by =  1, endpoint = FALSE)
seq2(from = -24, by =  1, endpoint = TRUE )
seq2(from = -24, by =  1, endpoint = FALSE)
seq2(from =  26, by = -1, endpoint = TRUE )
seq2(from =  26, by = -1, endpoint = FALSE)
seq2(from = -24, by = -1, endpoint = TRUE )
seq2(from = -24, by = -1, endpoint = FALSE)


seq2(from = 1, length.out = 26, endpoint = TRUE )
seq2(from = 1, length.out = 26, endpoint = FALSE)


seq2(from = 1, along.with = letters, endpoint = TRUE )
seq2(from = 1, along.with = letters, endpoint = FALSE)


seq2(to =  26, by =  1, endpoint = TRUE )
seq2(to =  26, by =  1, endpoint = FALSE)
seq2(to = -24, by =  1, endpoint = TRUE )
seq2(to = -24, by =  1, endpoint = FALSE)
seq2(to =  26, by = -1, endpoint = TRUE )
seq2(to =  26, by = -1, endpoint = FALSE)
seq2(to = -24, by = -1, endpoint = TRUE )
seq2(to = -24, by = -1, endpoint = FALSE)


seq2(to = 26, length.out = 26, endpoint = TRUE )
seq2(to = 26, length.out = 26, endpoint = FALSE)


seq2(to = 26, along.with = letters, endpoint = TRUE )
seq2(to = 26, along.with = letters, endpoint = FALSE)


seq2(by = 3, length.out = 26, endpoint = TRUE )
seq2(by = 3, length.out = 26, endpoint = FALSE)


seq2(by = 3, along.with = letters, endpoint = TRUE )
seq2(by = 3, along.with = letters, endpoint = FALSE)





seq2(from = -25, to = 25, by = 2, endpoint = TRUE )
seq2(from = -25, to = 25, by = 2, endpoint = FALSE)


seq2(from = 0, to = 25, length.out = 26, endpoint = TRUE )
seq2(from = 0, to = 25, length.out = 26, endpoint = FALSE)


seq2(from = 0, to = 25, along.with = letters, endpoint = TRUE )
seq2(from = 0, to = 25, along.with = letters, endpoint = FALSE)


seq2(from = 0, by = 2, length.out = 26, endpoint = TRUE )
seq2(from = 0, by = 2, length.out = 26, endpoint = FALSE)


seq2(from = 0, by = 2, along.with = letters, endpoint = TRUE )
seq2(from = 0, by = 2, along.with = letters, endpoint = FALSE)


seq2(to = 50, by = 2, length.out = 26, endpoint = TRUE )
seq2(to = 50, by = 2, length.out = 26, endpoint = FALSE)


seq2(to = 50, by = 2, along.with = letters, endpoint = TRUE )
seq2(to = 50, by = 2, along.with = letters, endpoint = FALSE)





seq2(length.out = 5)


seq2(0, 60, length.out = 21, endpoint = TRUE )
seq2(0, 60, length.out = 21, endpoint = FALSE)
seq2(0, 60, length.out = 20, endpoint = TRUE )
seq2(0, 60, length.out = 20, endpoint = FALSE)


seq2(60, length.out = 20, endpoint = FALSE)


seq2(-0.5, 0.5 - .Machine$double.eps/2, endpoint = FALSE)
seq2(-0.5, 0.5 - .Machine$double.eps/2, endpoint = TRUE )
seq2(-0.5, 0.5 - .Machine$double.eps/2, endpoint = FALSE, by = 1)
seq2(-0.5, 0.5 - .Machine$double.eps/2, endpoint = TRUE , by = 1)
seq2(-0.5, 0.5                        , endpoint = FALSE)
seq2(-0.5, 0.5                        , endpoint = TRUE )
seq2(-0.5, 0.5                        , endpoint = FALSE, by = 1)
seq2(-0.5, 0.5                        , endpoint = TRUE , by = 1)
seq2(-0.5, 0.5 + .Machine$double.eps/2, endpoint = FALSE)
seq2(-0.5, 0.5 + .Machine$double.eps/2, endpoint = TRUE )
seq2(-0.5, 0.5 + .Machine$double.eps/2, endpoint = FALSE, by = 1)
seq2(-0.5, 0.5 + .Machine$double.eps/2, endpoint = TRUE , by = 1)

ArcadeAntics/essentials documentation built on Nov. 7, 2024, 4:33 p.m.