[R] bug?

From: ronggui <042045003_at_fudan.edu.cn>
Date: Fri 16 Dec 2005 - 00:26:44 EST


> library(foreign)
> da<-read.dta(file.choose())
> da

    startdat starttim enddate endtime days hoursmin secused 1 2005-01-11 2 2005-12-15 20.19 NA NA 9

> attributes(da)

$datalabel
[1] "Example of use of date and time functions"

$time.stamp
[1] "15 ʮ 2005 20"

$names
[1] "startdat" "starttim" "enddate" "endtime" "days" "hoursmin" "secused"

$formats
[1] "%d" "%5.2f" "%d" "%5.2f" "%3.0f" "%5.2f" "%4.0f"

$types
[1] 253 255 253 255 252 255 252

>write.foreign(da,"c:\\da.sps","da.txt","SPSS")
then I try to run the da.sps,some errors come.I think the write.foreign function needs some improvement. It seems SPSS does not have such date/time data format as yyyy-mm-dd. Here is some information about the spss date/time format.

"Date/Time. Valid values include dates of the general format dd-mm-yyyy, mm/dd/yyyy, dd.mm.yyyy, yyyy/mm/dd, hh:mm:ss, and a variety of other date and time formats. Months can be represented in digits, Roman numerals, or three-letter abbreviations, or they can be fully spelled out."

>Warning # 1102
>An invalid numeric field has been found. The result has been set to the
>system-missing value.

>Command line: 7 Current case: 1 Current splitfile group: 1
>Field contents: '2005-01-11'
>Record number: 1 Starting column: 1 Record length: 37

>Warning # 1102
>An invalid numeric field has been found. The result has been set to the
>system-missing value.

>Command line: 7 Current case: 1 Current splitfile group: 1
>Field contents: '2005-12-15'
>Record number: 1 Starting column: 14 Record length: 37

>Warning # 1102
>An invalid numeric field has been found. The result has been set to the
>system-missing value.

>Command line: 7 Current case: 1 Current splitfile group: 1
>Field contents: 'NA'
>Record number: 1 Starting column: 31 Record length: 37

>Warning # 1102
>An invalid numeric field has been found. The result has been set to the
>system-missing value.

>Command line: 7 Current case: 1 Current splitfile group: 1
>Field contents: 'NA'
>Record number: 1 Starting column: 34 Record length: 37

> packageDescription("foreign")

Package: foreign
Priority: recommended
Version: 0.8-11
Date: 2005-12-08
Title: Read Data Stored by Minitab, S, SAS, SPSS, Stata, Systat, dBase,

        ...
Depends: R (>= 2.2.0)
Imports: stats, methods
Maintainer: R-core <R-core@r-project.org> Author: R-core members, Saikat DebRoy <saikat@stat.wisc.edu>, Roger

        Bivand <Roger.Bivand@nhh.no> and others: see COPYRIGHTS file in
        the sources.
Description: Functions for reading and writing data stored by
        statistical packages such as Minitab, S, SAS, SPSS, Stata,
        Systat, ..., and for reading and writing .dbf (dBase) files.
License: GPL version 2 or later
Packaged: Fri Dec 9 14:46:20 2005; ripley Built: R 2.2.0; i386-pc-mingw32; 2005-12-10 14:23:19; windows                                  

2005-12-15



Deparment of Sociology
Fudan University

My new mail addres is ronggui.huang@gmail.com Blog:http://sociology.yculblog.com



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