Hello ..
A really simple question for you. for some reason I am not getting it
right..
How do I add time (in specified units) to a column of observed date/time
(say a date-time in ISO 8601 format). For example,
"2007-12-05T09:45:00" + 3 days
"2007-13-05T09:45:00" + 3 hours
Thanks so much!
Santosh
On Tue, Apr 24, 2012 at 9:15 AM, René Mayer <ma...@psychologie.tu-dresden.de
> wrote:
> Thanks Michael,
> cumsum - yes of course!
> Regards,
> René
>
>
> Zitat von "R. Michael Weylandt" <michael.weyla...@gmail.com>:
>
>
> ? cumsum
>>
>> something like
>>
>> library(chron) # Reporting packages you use is always considerate
>> mt <- times(c('00:05:00', '00:15:00', '00:30:00')) # Spaces are legible!
>>
>> times("09:30:00") + cumsum(mt)
>>
>> Michael
>>
>> On Tue, Apr 24, 2012 at 11:35 AM, René Mayer
>> <ma...@psychologie.tu-dresden.**de <ma...@psychologie.tu-dresden.de>>
>> wrote:
>>
>>> Dear List,
>>> given a vecor of times in 5,15 and 30 minutes and a start point
>>> in time, lets say 09:30:00, how do I add up those times
>>> to the start time getting a cumulative time sequence?
>>>
>>> mt<-times(c('00:05:00', '00:15:00', '00:30:00'))
>>> mt wanted
>>> 00:05:00 09:35:00
>>> 00:15:00 09:50:00
>>> 00:30:00 10:20:00
>>>
>>> Regards,
>>> René
>>>
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>>
>>
> ______________________________**________________
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>
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