From "Martin Weiss" To Subject AW: st: Calculate the average bid-ask spread for each centile Date Fri, 27 Mar 2009 13:09:15 +0100

```<>

*************
clear*

inp str10(day	hhmmss)	centile
20080602		90302	1
20080602		90510	1
20080602		100408	2
20080602		100908	2
20080602		160007	100
20080602		160107	100
20080603		90302	1
20080603		90510	1
20080603		100408	2
20080603		100908	2
20080603		160007	100
20080603		160107	100
end

*************

HTH
Martin

-----Ursprüngliche Nachricht-----
Von: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von emanuele
canegrati
Gesendet: Freitag, 27. März 2009 13:07
An: statalist@hsphsun2.harvard.edu

Thank you vary much Maarten. It works. The only problem is that I have the
same average spread for different days, while I want the mean calculated for
each centile of each day. In other words, if days are 10 I have now 100
means, while I should have 10*100 means calculated. Is it possible?

Thank you again.

----------------------------------------
> Date: Fri, 27 Mar 2009 11:39:59 +0000
> From: maartenbuis@yahoo.co.uk
> Subject: Re: st: Calculate the average bid-ask spread for each centile
> To: statalist@hsphsun2.harvard.edu
>
>
> --- On Fri, 27/3/09, emanuele canegrati wrote:
>
>> centiles, with respect to trading time. Now I want to
>> calculate the average spread for each centile. The structure
>> of data is the following
>>
>> 20080602 xxxx 090302 1
>> 20080602 xxxx 090510 1
>> ...
>> 20080602 xxxx 100408 2
>> 20080602 xxxx 100908 2
>> ...
>> 20080602 xxxx 160007 100
>> 20080602 xxxx 160107 100
>> ...
>> 20080603 xxxx 090302 1
>> 20080603 xxxx 090510 1
>> ...
>> 20080603 xxxx 100408 2
>> 20080603 xxxx 100908 2
>> ...
>> 20080603 xxxx 160007 100
>> 20080603 xxxx 160107 100
>> ...
>>
>> What is the loop I have to write?
>
> no loop necesary:
>
>
> Hope this helps,
> Maarten
>
> -----------------------------------------
> Maarten L. Buis
> Institut fuer Soziologie
> Universitaet Tuebingen
> Wilhelmstrasse 36
> 72074 Tuebingen
> Germany
>
> http://home.fsw.vu.nl/m.buis/
> -----------------------------------------
>
>
>
>
>
>
>
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```