[Rd] cut.POSIXt problem with breaks= "quarter" (PR#14162)

From: <shmunde_at_googlemail.com>
Date: Mon, 21 Dec 2009 13:45:09 +0100 (CET)


Full_Name: Qing Xia
Version: 2.10.0
OS: Windows XP
Submission from: (NULL) (213.71.23.233)

I find, when I use "cut" function to cut date-time objects based on breaks = "quarter", there exists a problem. It means, if the date-time has "JJJJ-MM-30" or "JJJJ-MM-31", then "cut" runs not correctly, it gives wrong levels. Detail can be found in the following R-Output:

  1. correct Output levels, if there is no date-time "JJJJ-MM-30" or "JJJJ-MM-31"

> x<- as.Date(c("2009-03-21","2009-03-24"))
> cut(x, breaks= "quarter")

[1] 2009-01-01 2009-01-01
Levels: 2009-01-01

2. wrong Output levels, if there exists date-time "JJJJ-MM-30" or "JJJJ-MM-31"

> x<- as.Date(c("2009-03-21","2009-03-30"))
> cut(x, breaks= "quarter")

[1] 2009-01-01 2009-01-01
Levels: 2009-01-01 2009-04-01

> x<- as.Date(c("2009-03-21","2009-03-31"))
> cut(x, breaks= "quarter")

[1] 2009-01-01 2009-01-01
Levels: 2009-01-01 2009-04-01



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https://stat.ethz.ch/mailman/listinfo/r-devel Received on Mon 21 Dec 2009 - 17:17:12 GMT

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