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


From   Nick Cox <njcoxstata@gmail.com>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   Re: st: tsspell--end to include an event.
Date   Fri, 19 Apr 2013 17:47:34 +0100

Sorry; I meant -fcond()-.

The help does explain -fcond()- as a way of defining a spell by its start.
Nick
njcoxstata@gmail.com


On 19 April 2013 17:42, Steven Archambault <archstevej@gmail.com> wrote:
> 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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