lag_by_group {rdss} | R Documentation |
Generate lags in grouped data
Description
See https://book.declaredesign.org/observational-causal.html#difference-in-differences
Usage
lag_by_group(x, groups, n = 1, order_by, default = NA)
Arguments
x |
Vector of values |
groups |
Grouping variable |
n |
Positive integer of length 1, giving the number of positions to lead or lag by |
order_by |
Ordering variable withing group (e.g., time) |
default |
Value used for non-existent rows. Defaults to NA. |
Value
vector of lagged values
[Package rdss version 1.0.14 Index]