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Re: st: STATA date question
From
Nick Cox <[email protected]>
To
"[email protected]" <[email protected]>
Subject
Re: st: STATA date question
Date
Wed, 29 Jan 2014 19:54:26 +0000
Sorry; last statement should just be
replace newdate = newdate + 4 - dow(newdate)
Nick
[email protected]
On 29 January 2014 19:23, Nick Cox <[email protected]> wrote:
> One approximation is that 18 months on is 366 + 183 = 549 days away.
>
> gen newdate = date + 549
>
> Then to get Thursdays we need -dow(newdate)- to be 4. Thus we could
> say that if -dow(newdate)- is 5 or 6, we subtract 1 or 2; if 0,1,2, or
> 3 we add 4,3,2, or 1.
>
> That boils down to
>
> replace newdate = cond(dow(newdate) <= 4, newdate + 4 - dow(newdate),
> newdate - 4 + dow(newdate))
>
> For "STATA" read "Stata" throughout.
>
> Nick
> [email protected]
>
>
> On 29 January 2014 14:13, Ed Levitas <[email protected]> wrote:
>
>> I'm trying to output dates that occur on the Thursday after 18 months have passed since a beginning date. For example, assume my beginning date is January 1, 2014. The Thursday after 18 months have passed from this date is July 2, 2015. In this case, I am not concerned with how many days are in each month (e.g., I don't care that January 2014 has 31 days and February 2014 has only 28). I treat month duration as equivalent regardless of days within each month. I have examined datetime but am still unsure as to how to accomplish this in STATA. Can you please suggest a way in STATA to produce this output?
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