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Re: st: duplicated datetime variable differs from original datetime variable it was derived from
From
Nick Cox <[email protected]>
To
"[email protected]" <[email protected]>
Subject
Re: st: duplicated datetime variable differs from original datetime variable it was derived from
Date
Tue, 12 Nov 2013 11:41:05 +0000
Phil has the answer in one. Unfortunately, you do have to keep
remembering that a date-time to Stata is just an integer, usually
large, giving time in milliseconds.
. di %14.0f clock("07jun2012 03:11:48", "DMYhms")
1654657908000
Numbers that big have to be stored as -double-s.
Nick
[email protected]
On 12 November 2013 11:33, Phil Clayton <[email protected]> wrote:
> Dates with times need to be stored in double precision. Try:
> gen double time1=time
>
> See -help datetime-
>
> Phil
>
> On 12 Nov 2013, at 10:25 pm, Milena Przheska <[email protected]> wrote:
>
>> Dear Statalist members,
>>
>> When duplicating a time variable by typing
>>
>> gen time1 =time
>>
>> the new variable time1 is off by several seconds from the variable time, so
>>
>> time
>> 06jun2012 22:44:51
>> 06jun2012 22:44:54
>> 06jun2012 22:44:56
>> 07jun2012 01:39:58
>> 07jun2012 01:40:05
>> 07jun2012 01:40:45
>> 07jun2012 03:09:48
>> 07jun2012 03:09:48
>> 07jun2012 03:11:06
>>
>> becomes
>>
>> time1
>> 06jun2012 22:45:17
>> 06jun2012 22:45:17
>> 06jun2012 22:45:17
>> 07jun2012 01:40:03
>> 07jun2012 01:40:03
>> 07jun2012 01:40:03
>> 07jun2012 03:09:37
>> 07jun2012 03:09:37
>> 07jun2012 03:11:48
>>
>>
>> I would appreciate your help with resolving this problem.
>>
>> Thank you all,
>> Milena
>> *
>> * For searches and help try:
>> * http://www.stata.com/help.cgi?search
>> * http://www.stata.com/support/faqs/resources/statalist-faq/
>> * http://www.ats.ucla.edu/stat/stata/
>
>
> *
> * For searches and help try:
> * http://www.stata.com/help.cgi?search
> * http://www.stata.com/support/faqs/resources/statalist-faq/
> * http://www.ats.ucla.edu/stat/stata/
*
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