Re: st: Average when -inrange()-

[Joseph Monte <hmjc66@gmail.com>]

Thanks, Nick. I think I got it!

sort group date2
gen count1=.
gen mean1=.
qui forval i = 1/`=_N'{
      count if group==group[`i'] &
inrange(date2,ninetydaysbefore[`i'],date1[`i'])
      replace count1 = r(N) in `i'
      summarize price if group==group[`i'] &
inrange(date2,ninetydaysbefore[`i'],date1[`i'])
      replace mean1 = r(mean) in `i'
      }

Joe


On Thu, Nov 17, 2011 at 11:33 PM, Nick Cox <njcoxstata@gmail.com> wrote:
> Just use the same -if- condition together with -summarize-. Same idea
> of initialising a variable before the loop and -replace- within the
> loop.
>
> Nick
>
> On Thu, Nov 17, 2011 at 10:06 PM, Joseph Monte <hmjc66@gmail.com> wrote:
>> Dear Statalisters,
>>
>> The code below gives me the number of observations (i.e. count1) when
>> "date2" occurs between two dates - "ninetydaysbefore" and "date1" -
>> based on "group". I also need the average of another variable called
>> "price" of the observations that are counted. I am not sure how to
>> incorporate it within the loop below.
>>
>> sort group date2
>> gen count1=.
>> qui forval i = 1/`=_N'{
>>    count if group==group[`i'] & inrange(date2,ninetydaysbefore[`i'],date1[`i'])
>>        replace count1 = r(N) in `i'
>>        }
>>
>> I am using Stata 12.
>>
>> Thanks,
>>
>> Joe
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>
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