[R] time zone convert

[David Winsemius]

On Apr 29, 2010, at 10:14 AM, Carol Gao wrote:

> Appreciate it! I was trying on the code you sent, then some error  
> codes
> turned up:
>
> The first line runs ok, the second line:
>
>> modifyList(Time2, list(hour = Time2$hour + 11))
> Error in Time2$hour : $ operator is invalid for atomic vectors
>
> The time format I used for reading the Time vector is "%d-%b-%Y %H: 
> %M:%OS".

It appears you have already created a datetime object from a read  
operation on that csv file, in which case adding 11 hours should be  
straightforward.

Time.plus.11hr <- Time + 11*60*60

-- 
David

> Should I change any code above?
>
> Carol
>
>
>
> On Thu, Apr 29, 2010 at 11:47 PM, Henrique Dallazuanna <wwwhsd at gmail.com 
> >wrote:
>
>> Try this:
>>
>> Time2 <- gsub("\\.*", "", tolower(Time))
>> modifyList(Time2, list(hour = Time2$hour + 11))
>>
>>
>> On Thu, Apr 29, 2010 at 10:33 AM, Carol Gao <carol.gaox at gmail.com>  
>> wrote:
>>
>>> Hi there,
>>>
>>> I've got a column vector in a csv file as follows, and I need to  
>>> add 11
>>> hours to each of them. Is there a way that I can do it? (The  
>>> actual file
>>> size is much bigger than this.)
>>>
>>> Time
>>> "01-DEC-2008 00:00:28.611"
>>> "01-DEC-2008 00:00:43.155"
>>> "01-DEC-2008 00:01:06.677"
>>> "01-DEC-2008 00:01:06.677"
>>> "01-DEC-2008 00:01:06.677"
>>> "01-DEC-2008 00:01:06.919"
>>> "01-DEC-2008 00:23:46.452"
>>> "02-DEC-2008 00:03:17.646"
>>> "02-DEC-2008 00:03:17.652"
>>> "03-DEC-2008 00:15:11.485"
>>> "03-DEC-2008 00:18:44.652"
>>> "03-DEC-2008 00:22:17.447"
>>>
>>> Thank you in advance.
>>>
>>> Cheers,
>>>
>>> Carol
>>>
>>>       [[alternative HTML version deleted]]
>>>
>>> ______________________________________________
>>> 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.
>>>
>>
>>
>>
>> --
>> Henrique Dallazuanna
>> Curitiba-Paraná-Brasil
>> 25° 25' 40" S 49° 16' 22" O
>>
>
> 	[[alternative HTML version deleted]]
>
> ______________________________________________
> 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.

David Winsemius, MD
West Hartford, CT