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...n the calculations. # It would be easy to do for the example above by hand (subset) but not for my dataset including a whole year. # does anyone know how to do that? # It would be very helpful! Tagmarie -- View this message in context: http://r.789695.n4.nabble.com/apply-a-function-at-dateX-dateX-1-dateX-2-tp4652488.html Sent from the R help mailing list archive at Nabble.com.

Hello, I'm dealing with financial time series. I'm trying to find out X in this sentence: The most recent close is the lowest level since X(date). Here's an example of what I'm looking for: library(fBasics) data(DowJones30) tail(DowJones30[,1:5],n=10) I need to come up with a vector that would look like this AA AXP T ... 2000-12-21

Dear Sir/Madam, I converted the .dta into .Rdata with the foreign library read.dta. However, when I use fix() I get the message that the dates are discarded. Before fix(), class(dateX) gives 'dates' as class; after fix() class(dateX) gives 'character' Why is that? Best regards, Rob Bakker [[alternative HTML version deleted]]