This is a year-day method for the `seq()`

generic.

Sequences can only be generated for `"year"`

precision year-day vectors.

When calling `seq()`

, exactly two of the following must be specified:

`to`

`by`

Either

`length.out`

or`along.with`

## Usage

```
# S3 method for clock_year_day
seq(from, to = NULL, by = NULL, length.out = NULL, along.with = NULL, ...)
```

## Arguments

- from
`[clock_year_day(1)]`

A

`"year"`

precision year-day to start the sequence from.`from`

is always included in the result.- to
`[clock_year_day(1) / NULL]`

A

`"year"`

precision year-day to stop the sequence at.`to`

is cast to the type of`from`

.`to`

is only included in the result if the resulting sequence divides the distance between`from`

and`to`

exactly.- by
`[integer(1) / clock_duration(1) / NULL]`

The unit to increment the sequence by.

If

`by`

is an integer, it is transformed into a duration with the precision of`from`

.If

`by`

is a duration, it is cast to the type of`from`

.- length.out
`[positive integer(1) / NULL]`

The length of the resulting sequence.

If specified,

`along.with`

must be`NULL`

.- along.with
`[vector / NULL]`

A vector who's length determines the length of the resulting sequence.

Equivalent to

`length.out = vec_size(along.with)`

.If specified,

`length.out`

must be`NULL`

.- ...
These dots are for future extensions and must be empty.

## Examples

```
# Yearly sequence
x <- seq(year_day(2020), year_day(2040), by = 2)
x
#> <year_day<year>[11]>
#> [1] "2020" "2022" "2024" "2026" "2028" "2030" "2032" "2034" "2036" "2038"
#> [11] "2040"
# Which we can then set the day of to get a sequence of end-of-year values
set_day(x, "last")
#> <year_day<day>[11]>
#> [1] "2020-366" "2022-365" "2024-366" "2026-365" "2028-366" "2030-365"
#> [7] "2032-366" "2034-365" "2036-366" "2038-365" "2040-366"
# Daily sequences are not allowed. Use a naive-time for this instead.
try(seq(year_day(2019, 1), by = 2, length.out = 2))
#> Error in seq(year_day(2019, 1), by = 2, length.out = 2) :
#> `from` must be 'year' precision.
as_year_day(seq(as_naive_time(year_day(2019, 1)), by = 2, length.out = 2))
#> <year_day<day>[2]>
#> [1] "2019-001" "2019-003"
```