Your request seems bizarre to me. If you really want to ignore the actual time
intervals, just do your analysis without the actual dates.
If you just want forward-looking time intervals, then put them in the correct
index locations.
?diff
c(diff(DF$DATE),1)
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Sent from my phone. Please excuse my brevity.
Geoffrey Smith <g...@asu.edu> wrote:
Hello, I have some unbalanced panel data that is measured on weekdays only
(i.e., excluding Saturday and Sunday). I would like to get the number of days
between dates such that the number of days between a Friday and a Monday is 1
(and not 3). Here is some code to illustrate my problem: library('Hmisc'); DATE
<-
as.Date(c('2011-05-18','2011-05-19','2011-05-20','2011-05-23','2011-05-24','2011-05-25'),
'%Y-%m-%d'); TEMP <- c(100,105,110,95,90,95); DAYS <- weekdays(DATE); DF <-
data.frame(DATE, TEMP, DAYS); DF; DF$DAYS.BETWEEN <- DF$DATE - Lag(DF$DATE);
DF; Essentially, I want to get it so the variable DAYS.BETWEEN is equal to 1
for observation number 4. Any ideas? Thank you. Geoff [[alternative
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