From rmh@surfer.sbm.temple.edu  Wed Oct 31 22:32:04 2001
From: rmh@surfer.sbm.temple.edu (rmh@surfer.sbm.temple.edu)
Date: Wed, 31 Oct 2001 23:32:04 +0100 (MET)
Subject: [Rd] strptime bug (PR#1155)
Message-ID: <200110312232.XAA20303@pubhealth.ku.dk>

Where is the strptime bug happening?  I am seeing it on W95 W98 W2000
running Rterm under ntemacs 21.1 with ESS 5.1.19 and using cygwin
2001/08/31 15:52:16 Starting cygwin install, version 2.78.2.3

Is strptime using the bash from my system? or is it using functions
that are included with R?

R defaulted to 1900 when I didn't specify a year.  The 1990 came from
the help(beav1).

When I explicitly place a year in the file, either the 1990 inidcated
in the help(beav1) file or the 1900 chosen to match the default, then
R gives me times consistent with the input.

> tmp <- beav1[90:93,]
> tmp
   day time  temp activ
90 346 2340 36.93     0
91 346 2350 36.83     0
92 347    0 36.93     0
93 347   10 36.83     0
> attach(tmp)
> strptime(paste(day, time %/% 100, time %% 100), "%j %H %M")
[1] "1900-01-01 23:40:00" "1900-01-01 23:50:00" "1900-01-01 00:00:00"
[4] "1900-01-01 00:10:00"
> strptime(paste(1900, day, time %/% 100, time %% 100), "%Y %j %H %M")
[1] "1900-12-12 23:40:00" "1900-12-12 23:50:00" "1900-12-13 00:00:00"
[4] "1900-12-13 00:10:00"
> strptime(paste(1990, day, time %/% 100, time %% 100), "%Y %j %H %M")
[1] "1990-12-12 23:40:00" "1990-12-12 23:50:00" "1990-12-13 00:00:00"
[4] "1990-12-13 00:10:00"
> 


Rich

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[Rd] strptime bug (PR#1155)
rmh@surfer.sbm.temple.edu