seq.Date {base}R Documentation

Generate Regular Sequences of Dates

Description

The method for seq for date-time classes.

Usage

## S3 method for class 'Date':
seq(from, to, by, length.out = NULL, along.with = NULL, ...)

Arguments

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.

Details

by can be specified in several ways.

Value

A vector of class "Date".

See Also

Date

Examples

## 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=12)
## quarters
seq(as.Date("2000/1/1"), as.Date("2003/1/1"), by="3 months")

## 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.Date(en, st, by="-1 month")
rev(ll[ll > st & ll < en])

[Package base version 2.1.0 Index]