2010 census[edit] As of the census of 2010, there were 1,313 people, 540 households, and 356 families residing in the city. The population density was 931.2 inhabitants per square mile (359.5/km2). There were 568 housing units at an average density of 402.8 per square mile (155.5/km2).
(plural surreplies) (law): An additional reply to a motion filed after the motion has already been fully briefed.
Use can probably use rollapply for this (via quantmod), but a quick and dirty way is to run sapply or lapply passing a set of index values. Here we will use sapply, which works on a list or vector of data.