Lag

0th

Percentile

Lag a Numeric, Character, or Factor Vector

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

Keywords
manip
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

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

Value

a vector like x

See Also

lag

Aliases
  • Lag
Examples
# NOT RUN {
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)
# }
Documentation reproduced from package Hmisc, version 4.0-3, License: GPL (>= 2)

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