[R] generating a sequence of seconds

[Bert Gunter]

Marc:

You just need to be more patient -- this is already happening:

http://en.wikipedia.org/wiki/Tidal_acceleration

Cheers,
Bert

Bert Gunter
Genentech Nonclinical Biostatistics
(650) 467-7374

"Data is not information. Information is not knowledge. And knowledge
is certainly not wisdom."
Clifford Stoll




On Tue, Aug 12, 2014 at 1:10 PM, Marc Schwartz <marc_schwartz at me.com> wrote:
>
> On Aug 12, 2014, at 2:49 PM, John McKown <john.archie.mckown at gmail.com> wrote:
>
>> And some people wonder why I absolutely abhor daylight saving time.
>> I'm not really fond of leap years and leap seconds either. Somebody
>> needs to fix the Earth's rotation and orbit!
>
>
> I have been a longtime proponent of slowing the rotation of the Earth on its axis, so that we could have longer days to be more productive.
>
> Unfortunately, so far, my wish has gone unfulfilled...at least as it is relevant within human lifetimes.
>
> ;-)
>
> Regards,
>
> Marc
>
>
>>
>> On Tue, Aug 12, 2014 at 2:14 PM, William Dunlap <wdunlap at tibco.com> wrote:
>>>> What if I just want the seconds vector without the date, please?  Is there
>>>> a convenient way to create such a vector, please?
>>>
>>> Why do you want such a thing?  E.g., do you want it to print the time
>>> of day without the date?  Or are you trying to avoid numeric problems
>>> when you do regressions with the seconds-since-1970 numbers around
>>> 1414918800?  Or is there another problem you want solved?
>>>
>>> Note that the number of seconds in a day depends on the day and the
>>> time zone.  In US/Pacific time I get:
>>>
>>>> length(seq(from=as.POSIXct("2014-08-12
>>> 00:00:00"),to=as.POSIXct("2014-08-12 23:59:59"), by="secs"))
>>>  [1] 86400
>>>> length(seq(from=as.POSIXct("2014-03-09
>>> 00:00:00"),to=as.POSIXct("2014-03-09 23:59:59"), by="secs"))
>>>  [1] 82800
>>>> length(seq(from=as.POSIXct("2014-11-02
>>> 00:00:00"),to=as.POSIXct("2014-11-02 23:59:59"), by="secs"))
>>>  [1] 90000
>>>
>>> Bill Dunlap
>>> TIBCO Software
>>> wdunlap tibco.com
>>>
>>>
>>> On Tue, Aug 12, 2014 at 11:51 AM, Erin Hodgess <erinm.hodgess at gmail.com> wrote:
>>>> Hello!
>>>>
>>>> If I would like to generate a sequence of seconds for a date, I would do
>>>> the following:
>>>>
>>>> x <- seq(from=as.POSIXct(2014-08-12 00:00:00),to=as.POSIXct(2014-08-12
>>>> 23:59:59),by="secs")
>>>>
>>>> What if I just want the seconds vector without the date, please?  Is there
>>>> a convenient way to create such a vector, please?
>>>>
>>>> thanks,
>>>> Erin
>
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