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Why bother to -sort-? Does not change anything here, does it?
HTH
Martin
-----Ursprüngliche Nachricht-----
Von: [email protected]
[mailto:[email protected]] Im Auftrag von Austin Nichols
Gesendet: Montag, 9. November 2009 23:04
An: [email protected]
Betreff: Re: st: using postfile in a loop
There is no loop there. Try:
use masterfile
sort date ticker prc
tempname A
tempfile signals
preserve
qui sum RminusI, d
keep if RminusI < r(p10)
save `A'
restore
On Mon, Nov 9, 2009 at 4:54 PM, Kushan Thakkar <[email protected]> wrote:
> I have a dataset the contains the following data:
>
> cusip ticker date prc ....(few more variables).... RminusI
>
> I need to isolate data points for which RminusI is less than its first
> decile and then post these data points in a different file. This is
> the code I am using.
>
> =========================================
>
> use masterfile
>
> sort date ticker prc
>
> quitely sum RminusI
>
> tempname A
> tempfile signals
>
> postfile 'A' ticker date prc using `signals', replace
>
> post `A' (if RminusI < r(p10) ) //post to a new file if RminusI is
> less than first decile
>
> postclose `A'
>
> =========================================
>
> However, after the post command I get the following error:
>
> ifRminusI not found
> post: above message corresponds to expression 1, variable cusip
>
>
> What am I doing wrong? Is there a more efficient way to do this ?
>
> Thanks,
> Kush
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