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Re: st: Distorted time when building SIFs from components


From   Milena Przheska <milena.przheska@cosmicdevelopment.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Distorted time when building SIFs from components
Date   Wed, 25 Dec 2013 14:37:35 +0100

Thank you for your help Nick.

Happy Holidays!

Milena

On Wed, Dec 25, 2013 at 2:00 PM, Nick Cox <njcoxstata@gmail.com> wrote:
> <>
>
> Use -double- for your variable, not -float-.
> Nick
> njcoxstata@gmail.com
>
>
> On 25 December 2013 12:44, Milena Przheska
> <milena.przheska@cosmicdevelopment.com> wrote:
>> Dear Statalist members,
>>
>> I have a dateime variable 'time' with format %tc and a 'date' variable
>> with only the date. I needed a variable that will show the date and
>> the hour, so that observations happening on the same date in the same
>> hour would have same time stamp. Therefore, I first extracted the
>> year, month and day from 'date' and hour from 'time'. Then I generated
>> two separate variables with values 0, to serve as minutes and seconds.
>> Finally, I build a time stamp from these components, but instead of
>> getting datetime variable with zero minutes and seconds, I got a
>> variable that had altered hour, minutes and second.
>>
>> Can anyone please let me know why this happens and how can I fix it?
>>
>> Commands:
>>
>> gen double date = dofc(time)
>> format date %td
>>
>> gen double Y = year(date)
>>
>> gen double M = month(date)
>>
>> gen double D = day(date)
>>
>> gen double h = hh(time)
>>
>> gen double m = 0
>>
>> gen double s = 0
>>
>> gen short_time = mdyhms(M, D, Y, h, m, s)
>> format short_time %tc
>>
>>
>> Results:
>>
>> m    s    h      Y      M    D     short_time
>> 0    0    18    2013    5    22    22may2013 17:59:21
>> 0    0    14    2013    5    26    26may2013 13:59:40
>> 0    0    6     2013    5    4     04may2013 05:58:58
>> 0    0    20    2013    5    9     09may2013 20:00:14
>> 0    0    2     2013    6    5     05jun2013 01:59:13
>> 0    0    6     2013    7    8     08jul2013 05:59:40
>> 0    0    6     2013    7    8     08jul2013 05:59:40
>>
>>
>> I would appreciate your help.
>>
>> Thank you,
>> Milena
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