R: Subsetting a time series

subset.ts {forecast}

R Documentation

Subsetting a time series

Description

The main purpose of this function is to extract the values of a specific season in each year. For example, to extract all values for the month of May from a time series.

Usage

## S3 method for class 'ts'
subset(x, subset=NULL, month=NULL, quarter=NULL, season=NULL, ...)

Arguments

`x`	a univariate time series to be subsetted
`subset`	optional logical expression indicating elements to keep; missing values are taken as false.
`month`	Character list of months to retain. Partial matching on month names used.
`quarter`	Numeric list of quarters to retain.
`season`	Numeric list of seasons to retain.
`...`	Other arguments, unused.

Value

If one season per year is extracted, then a ts object is returned with frequency 1. Otherwise, a numeric vector is returned with no ts attributes.

Author(s)

Rob J Hyndman

Examples

plot(subset(gas,month="November"))
subset(woolyrnq,quarter=3)

[Package forecast version 3.24 Index]