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Re: st: tsspell--end to include an event.


From   Steven Archambault <archstevej@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: tsspell--end to include an event.
Date   Fri, 19 Apr 2013 10:42:15 -0600

Thanks for the reply. The issue with the suggested code is that it
only considers a spell if harvest>0. I want the spell to include all
the non-harvest leading up to the harvest event.

And sorry for not mentioning the source: -tsspell- from SSC. It is a
great, and very useful, user written program.

Regards,
Steve





On Fri, Apr 19, 2013 at 10:20 AM, Nick Cox <njcoxstata@gmail.com> wrote:
> -tsspell- is from SSC. Please remember the longstanding and explicit
> request to explain _where_ user-written programs you refer to come
> from.
>
> For this I would reverse time temporarily.
>
> gen negdate = -date
> tsset negdate
> tsspell, pcond(harvest)
> tsset date
>
> However, it seems that you have gaps in your data. In which case
>
> sort date
> gen negtime = - _n
> tsset negtime
>
> may work better for you.
>
> Nick
> njcoxstata@gmail.com
>
>
> On 19 April 2013 17:10, Steven Archambault <archstevej@gmail.com> wrote:
>> Hi all,
>>
>> I am learning to use -tsspell-. My hope is to have the spell include 0
>> events, and end with the first positive event. However, I want that
>> positive event (a harvest) to be included in the spell. How do I make
>> a rule for that?
>>
>> Example
>>
>> date            harvest    spell
>> 10sep2010   0             1
>> 11sep2010   0              1
>> 12sep2010   0              1
>> 15sep2010   0              1
>> 17sep2010   20             1
>> 20sep2010    0               2
>> 23sep2010    10            2
>> 25sep2010     0              3
>>
>> Any help is appreciated!
>>
>> Thanks,
>> Steve
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