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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 17:20:26 +0100

-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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