seq.Date

R Base 3.6.2

The method for seq for objects of class class "Date" representing calendar dates.

Syntax

# S3 method for Date
seq(from, to, by, length.out = NULL, along.with = NULL, &#8230;)

Arguments

Parameter	Description
`from`	starting date. Required
`to`	end date. Optional.
`by`	increment of the sequence. Optional. See ‘Details’.
`length.out`	integer, optional. Desired length of the sequence.
`along.with`	take the length from the length of this argument.
`…`	arguments passed to or from other methods.

Return Value

A vector of class "Date".

Details

by can be specified in several ways. A number, taken to be in days. A object of class difftime A character string, containing one of "day", "week", "month", "quarter" or "year". This can optionally be preceded by a (positive or negative) integer and a space, or followed by "s". See seq.POSIXt for the details of "month".

Examples

Example

# NOT RUN {
## first days of years
seq(as.Date("1910/1/1"), as.Date("1999/1/1"), "years")
## by month
seq(as.Date("2000/1/1"), by = "month", length.out = 12)
## quarters
seq(as.Date("2000/1/1"), as.Date("2003/1/1"), by = "quarter")

## find all 7th of the month between two dates, the last being a 7th.
st <- as.Date("1998-12-17")
en <- as.Date("2000-1-7")
ll <- seq(en, st, by = "-1 month")
rev(ll[ll > st & ll < en])
# }