me.lag {metools}

Lag a data

Description

me.lag lag a vector if t>0 or lead a vector if t<0.

Usage

me.lag(x, t = 1, nafill = NA, extrapolate = FALSE)

Arguments

x

a vector

t

number of times to lag (default=1)

nafill

set value to fill NA's before first t value

extrapolate

if TRUE extrapolate excedent values, only if t>0 (default=FALSE)

Value

Return a vector.

Examples

v=c(3,2,5,6,5,4)
me.lag(v)

#now lead

me.lag(v,t=-1)