fill_run                Fill NA with previous non-NA element
lag_run                 Lag dependent on variable
length_run              Length of running windows
max_run                 Running maximum
mean_run                Running mean
min_run                 Running minimum
minmax_run              Running min/max
runner                  Apply running function
streak_run              Running streak length
sum_run                 Running sum
which_run               Running which
window_run              List of running windows
