[R] getting a timeseries element into a string

[spencerg]

Hello: 


      1.  I tried the example.  The first thing I noticed was that 
"library(fSeries)" loaded with the following comment: 


# The new version of 'fSeries' has been renamed to 'timeSeries'


      2.  With this, I tried "library(timeSeries)".  Then your first 
example worked without error. 


      3.  This time, "head(ts)" generated an error.  To diagnose it, I 
tried "str(ts)".  This generated a summary that I found beautifully 
formated but unintelligible.  To understand the object, I then tried 
"utils:::str.default(ts)".  This described the object in terms I could 
understand. 


      4.  Another "heads up":  "ts" is the name of a function in the 
"stats" package.  I would avoid creating an object by that name. 


      Hope this helps. 
      Spencer


David Winsemius wrote:
>
> On Jul 12, 2009, at 1:05 PM, David Winsemius wrote:
>
>>
>> On Jul 12, 2009, at 8:10 AM, tradenet wrote:
>>
>>>
>>> I added a reproducible example to my question...
>>>
>>> ts<-dummyDailySeries(x = rnorm(365), units = NULL, zone = "", 
>>> FinCenter =
>>> "")
>>
>>
>> "Heads up" is an English colloquial warning.
>>
>> It may be reproducible on a machine that has all of your particular 
>> loaded packages, but certainly not on one that doesn't.
>>
>> ts<-dummyDailySeries(x = rnorm(365), units = NULL, zone = "", 
>> FinCenter =
>> + "")
>> Error: could not find function "dummyDailySeries"
>>
>> Many people who read the list just ignore postings where the 
>> questioner fails to indicate the package from which functions arise.
>>>
>>
>
> In penance for my failure to trim the r-help list address, I looked up 
> the function which is part of the fSeries package. I now wonder if 
> tradenet is using an outdated version. I get a different error after 
> installing and loading Package fSeries (270.76.1).
>
> > ts<-dummyDailySeries(x = rnorm(365), units = NULL, zone = "", 
> FinCenter =
> + "")
> Error in rulesFinCenter(FinCenter) :
>   There are no DST rules for GMT FinCenter!
>
> Eventually I convince the function into returning a result and then 
> ts[1,0] fails with this error message:
> > ts<-dummyDailySeries(x = rnorm(365), units = NULL, zone = "GMT", 
> FinCenter = "Zurich")
> > head(ts)
>                           TS.1
> 1970-01-01 01:00:00 -0.2463952
> 1970-01-02 01:00:00  0.9421668
> 1970-01-03 01:00:00  0.3354345
> 1970-01-04 01:00:00  1.7449670
> 1970-01-05 01:00:00  0.1551346
> 1970-01-06 01:00:00 -1.0082531
> > ts[1,0]
> Error in checkSlotAssignment(object, name, value) :
>   assignment of an object of class "NULL" is not valid for slot 
> "units" in an object of class "timeSeries"; is(value, "character") is 
> not TRUE
>
> So now I am wondering if the package was recently redesigned to use S4 
> methods. My suggestion is to repost if you are still puzzled after 
> updating your copy of fSeriesand reviewing the timeSeries extractor 
> functions for S4 objects including seriesPositions():
> X = timeSeries(matrix(rnorm(24), 12), timeCalendar())
> as.character(seriesPositions(X)@Data[1])
> [1] "2009-01-01"  # a character vector ... which is what was requested
>
>
> David Winsemius, MD
> Heritage Laboratories
> West Hartford, CT
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide 
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>