[R] Odd behavior of strptime
David Khabie-Zeitoune
dave at evocapital.com
Thu May 29 17:26:38 CEST 2003
The strptime object is a structured list object with 9 components. (Type
"names(z)" to see the names of the individual components). You may want
to convert the strptime object to a POSIXct object using
Z = as.POSIXct(z)
This is just a vector (of the expected length).
Cheers,
Dave
-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of
partha_bagchi at hgsi.com
Sent: 29 May 2003 16:05
To: r-help at stat.math.ethz.ch
Subject: [R] Odd behavior of strptime
The example from the help page for strptime has the following oddity:
> dates <- c("02/27/92", "02/27/92", "01/14/92",
+ "02/28/92", "02/01/92")
> times <- c("23:03:20", "22:29:56", "01:03:30",
+ "18:21:03", "16:56:26")
> x <- paste(dates, times)
> z <- strptime(x, "%m/%d/%y %H:%M:%S")
> z
[1] "1992-02-27 23:03:20" "1992-02-27 22:29:56" "1992-01-14 01:03:30"
"1992-02-28 18:21:03" "1992-02-01 16:56:26"
>
> length(z)
[1] 9
>
The length is always denoted as 9.
Of course this implies that any replacement I want to do with dates etc.
always fails with the error:
Error in "[[<-.data.frame"(*tmp*, D[I], value =
strptime(as.character(x[[D[I]]]), :
replacement has 9 rows, data has 5970
>
> version
_
platform i386-pc-mingw32
arch i386
os mingw32
system i386, mingw32
status
major 1
minor 7.0
year 2003
month 04
day 16
language R
>
(platform Win2000 professional)
Has anyone else encountered this?
Thanks,
Partha.
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