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st: RE: How to define shortest possible period with 95% of observations

From   Dan Waldo <>
To   statalist <>
Subject   st: RE: How to define shortest possible period with 95% of observations
Date   Tue, 11 May 2010 06:05:14 -0700 (PDT)

I may have grievously oversimplified the issue raised, but is it possible that the summarize command would work? That is, to use the 5th and 95th percentiles from
.summarize date if fires>0 & year==1983, detail

This could be turned into a forvalues loop if there are many years:
forval t=1978/1993 {
summarize date if fires>0 , detail

> Daniel Mueller
> I have a strongly unbalanced panel with 100,000 observations
> (=fire occurrences per day) that contain between none (no fire)
> and 3,000 fires per day for 8 years. The fire events peak in
> March and April with about 85-90% of the yearly total.
> My question is how I can define the shortest possible
> continuous period of days for each year that contains 95%
> of all yearly fires. The length  and width of the periods may
> slightly differ across the years due to
> climate and other parameters.
> I am sure there is a neat trick in Stata for this, yet I have not
> spotted it. Any suggestions would be appreciated.

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