The standard answer is to use
> as.POSIXlt("2007-05-14") - as.POSIXlt("1950-01-01")
Time difference of 20952 days
If you want to ensure the time difference is in daily units, then
> difftime(as.POSIXlt("2007-05-14"),
as.POSIXlt("1950-01-01"), units = "days")
Time difference of 20952 days
If you want to use the answer in numerical computations, then one more
coercion is usually needed
> as.numeric(difftime(as.POSIXlt("2007-05-14"),
as.POSIXlt("1950-01-01"), units =
"days"))
[1] 20952
Bill Venables
CSIRO Laboratories
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http://www.cmis.csiro.au/bill.venables/
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of threshold
Sent: Monday, 14 May 2007 7:16 PM
To: [email protected]
Subject: [R] number of days
Hi, some of you knows how to calculate in R the number of days between
given
dates?
issue relevant in option pricing
thanks, robert
--
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______________________________________________
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
