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# Re: st: date(s1,s2) leads to no values

 From "Eva Poen" <[email protected]> To [email protected] Subject Re: st: date(s1,s2) leads to no values Date Wed, 24 Sep 2008 22:08:27 +0100

```Fabian,

I think it's

gen begin = date(date,"ymd")

(note the small letters). It's all caps in Stata 10 but lowercase in
previous versions. I should have spotted it in the original email.

Eva

2008/9/24 Fabian Brenner <[email protected]>:
> Thank you for your help,
>
> I tried to use Eva's solution. The first step (replace date = substr(date,1,4) + "/" + substr(date,5,2) + "/" + substr(date,7,2)) does exactly what it should do but begin=date(date,"YMD") only produces missings again. (My dates have zeros filled in where necessary). I don't know why this happens.
>
> But Richard's solution did work.
> -todate statpers_as_string, gen(num_date) p(yyyymmdd)-
> -tostring num_date-
>
> Regards,
> Fabian
>
>
> -------- Original-Nachricht --------
>> Datum: Wed, 24 Sep 2008 20:43:29 +0100
>> Von: "Eva Poen" <[email protected]>
>> An: [email protected]
>> Betreff: Re: st: date(s1,s2) leads to no values
>
>> Alternatively, you can do
>>
>> replace date = substr(date,1,4) + "/" + substr(date,5,2) + "/" +
>> substr(date,7,2)
>>
>> followed by your original -generate- command. Prior to version 10,
>> Stata wants some form of separator when using the date() function.
>>
>> (This assumes that your dates have zeros filled in where necessary,
>> e.g. "19860701"),
>>
>> HTH,
>> Eva
>>
>>
>> 2008/9/24 Richard Goldstein <[email protected]>:
>> > If I remember correctly, version 8 could not deal with run-together
>> dates
>> > like this
>> >
>> > download the -todate- file from ssc (when connected to the internet,
>> type
>> > -ssc install todate- on the Stata command line)
>> >
>> > Rich
>> >
>> > Fabian Brenner wrote:
>> >>
>> >> Dear all:
>> >>
>> >> variable "date" is str8   %9s (one example:19861230). I would like to
>> use
>> >> gen begin=date(date,"YMD") to get elapsed dates but stata does not put
>> any
>> >> values in variable "begin" (only missings).
>> >>
>> >> Hope someone can help me. I use stata 8.
>> >> Fabian
>> *
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```

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