Message-ID: <20050819101410.GA29803@stat.umu.se>
Date: 2005-08-19T10:14:10Z
From: Göran Broström
Subject: Handling dates
I have a problem with some functions handling dates, in packages 'date' and
'survival' (they seem to be identical). For instance, from the documentation,
--------------------
mdy.date {survival}
R Documentation
Convert to Julian Dates
Description
Given a month, day, and year, returns the number of days since January 1, 1960.
Usage
mdy.date(month, day, year, nineteen = TRUE, fillday = FALSE,
fillmonth = FALSE)
----------------------------
but
> library(survival)
> mdy.date(12, 1, 1977)
[1] 1Dec77
Similar strange results appear in other date-related functions. I plan to
write functions that converts, eg, "1977-01-31" to the real number 1977.084
and back. What function in R does what 'mdy.date' claims to do?
I'm on
platform i686-pc-linux-gnu
arch i686
os linux-gnu
system i686, linux-gnu
status
major 2
minor 1.1
year 2005
month 06
day 20
language R
--
G??ran Brostr??m tel: +46 90 786 5223
Department of Statistics fax: +46 90 786 6614
Ume?? University http://www.stat.umu.se/~goran.brostrom/
SE-90187 Ume??, Sweden e-mail: gb at stat.umu.se