Re: [R] Question about time series

Hi >>TODAY <- as.POSIXlt('2004-01-17') >>LYTODAY <- as.POSIXlt('2003-01-17') >>DAYS <- TODAY-LYTODAY >>DAYS Time difference of 365 days >>DAYS[[1]] [1] 365 perhaps it helps, Christian Dennis Fisher wrote: I have data in the following format: > DATE [1] "01/13/2004" In order to find the d

Re: [R] Question about time series

Dennis Fisher <[EMAIL PROTECTED]> writes: > I have data in the following format: > > > DATE > [1] "01/13/2004" > > In order to find the difference between two data points, I presently > use brute force to calculate the day of the year: > > > strptime(DATE, format="%m/%d/%Y")$yday > [1] 12 >

[R] Question about time series

I have data in the following format: > DATE [1] "01/13/2004" In order to find the difference between two data points, I presently use brute force to calculate the day of the year: > strptime(DATE, format="%m/%d/%Y")$yday [1] 12 Although this works, it may not be robust over different years. I a