[R-sig-finance] warning messages with timeDate

[Diethelm Wuertz]

"timeDate" and "timeSeries" implement objects which are in some sense 
SPlus like concerning
the command structure, but very different in the underlying concept.

Internally all dates are POSIX dates which are handled in the "pure" GMT 
time zone excluding
daylight saving rules. This makes time and date management unique. So 
you have to find a way
to work within R  with GMT and no DST! The rest is done by the financial 
center concept. The
idea behind it is, that you have 1) the place where you recorded the 
data (handled by the argument
zone) and 2) where you use the data, this is handled by the  argument  
FinCenter.  The information
on DST is retrieved from the Ical date and tables.

For example, within this concept you can handle data records from around 
1980 when
Frankfurt and Zurich had different DST rules although they belong to the 
same time zone!

If you don't move internally in R to GMT without DST there can be 
created interferences and the
date conversions can become wrong, to remember this, you get the warnings!

regards
Diethelm Wuertz





oy, Tom wrote:

>When I am run the two following queries I get warning messages with the second one despite the time being the same does this matter I set myFinCenter to "GMT"?
>
>  
>
>>Sys.time()
>>    
>>
>[1] "2004-06-24 17:35:27 GMT Daylight Time"
>
>  
>
>>Sys.timeDate(FinCenter = myFinCenter)
>>    
>>
>[1] "GMT"
>[1] [2004-06-24 17:35:46]
>Warning messages: 
>1: Set timezone to GMT! in: Sys.timeDate(FinCenter = myFinCenter) 
>2: Set timezone to GMT! in: timeDate(as.character(Sys.time()), zone = "GMT", FinCenter = FinCenter) 
>3: Set timezone to GMT! in: print.timeDate(structure(list(), Data = structure(list(sec = as.integer(46), 
>
>Regards,
>  
>
>>Tom Joy
>>
>>    
>>
>
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