hi folks,
 
if i have an xts object as follows:
 
library(xts)
> dd <- as.POSIXct(strptime(c("2009-06-01 08:00:00", "2009-06-01
08:30:00","2009-06-01 09:00:00","2009-06-02 08:00:00", "2009-06-03
08:00:00", "2009-06-03 08:30:00"),"%Y-%m-%d %H:%M:%S"))
> a <- xts(1:6,dd)
> a
 
 

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