which ir function is used to show if observations are linear? zoo can you lag over an observation in r what is the lag in a time series can an observation be lagged where is the date of observationB for the zoo function how to find lag in time series how to lag observation over a group why use the function observationb when can i find the lag of i zoo which function shows the first observation of every location where to find the last observation in a zoo how do i limit lag which function limits the lag of a grouped time series? when do you lagged over an observation what does zoo lag in in r why is location date lag when you use a function lag over a time series what are lags in a time series can you lag observations by group in r how to limit lag in data series