lag function for data frames

October 29, 2012
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(This article was first published on Heuristic Andrew » r-project, and kindly contributed to R-bloggers)

When applying the stats::lag() function to a data frame, you probably expect it will pad the missing time periods with NA, but lag() doesn’t. For example: Nothing happened. Here is an alternative lag function made for this situation. It pads … Continue reading

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