shift

a vector you would like to shift (create
  lag or lead).

VarVect

numeric value specifying how many rows
  (time units) to shift the data by. Negative values shift
  the data down--lag the data. Positive values shift the
  data up--lead the data.

shiftBy

logical. Whether or not to remind you to
  order your data by the <code>GroupVar</code> and time variable
  before running <code>shift</code>.

reminder

The function shifts a vector up or down to create lag or
lead variables. Note: your data needs to be sorted by date.
The date should be ascending (i.e. increasing as it moves
down the rows).

R tools for combining and cleaning data sets, including filling in
    missing observations with data from another data frame and creating
    lag/lead variables.

Christopher Gandrud

DataCombine

R tools for making it easier to combine and clean data sets.

shift function

Largely based on TszKin Julian's <code>shift</code> function:
http://ctszkin.com/2012/03/11/generating-a-laglead-variables/

shift: A function for creating lag and lead variables.

Description

Usage

Arguments

Value

source

Details

See Also