its.format("%Y-%m-%d")
b <- newIts(start="2003-01-01",end="2003-01-20")
rangeIts(b,start = "2003-01-05" ,end= "2003-01-15")
rangeIts(b,start = ISOdate(2003,1,5,hour=0) ,end= ISOdate(2003,1,15,hour=0))
b[1:3,]
b[,1]
b[,dates=ISOdate(2003,1,1,hour=0)]
its.format("%a %d %b %Y")
c <- newIts()
extractIts(c,weekday=TRUE,period="month",find="last") #the last weekdays of the month in c
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