Lag: Lag a numeric, character, or factor vector

In EarthSystemDiagnostics/prxytools: Tools to Assist with Proxy Analyses

Lag a numeric, character, or factor vector

Description

Shifts a vector shift elements later. Character or factor variables are padded with "", numerics with NA. The shift may be negative.

Usage

Lag(x, shift = 1)

Arguments

x	a vector
shift	integer specifying the number of observations to be shifted to the right. Negative values imply shifts to the left.

Details

Attributes of the original object are carried along to the new lagged one.

Value

a vector like x.

Author(s)

Frank E Harrel Jr

Source

<https://CRAN.R-project.org/package=Hmisc>

See Also

lag

Examples

Lag(1:5,2)
Lag(letters[1:4],2)
Lag(factor(letters[1:4]),-2)
# Find which observations are the first for a given subject
id <- c('a','a','b','b','b','c')
id != Lag(id)
!duplicated(id)

EarthSystemDiagnostics/prxytools documentation built on Jan. 15, 2024, 9:33 p.m.