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Re: RE: st: RE: Random assignment


From   =?GB2312?B?yNm58w==?= <[email protected]>
To   "[email protected]" <[email protected]>
Subject   Re: RE: st: RE: Random assignment
Date   Sat, 01 Jan 2005 17:42:50 +0800

i am new to stata,so i can't understand some stat functions.
can anyone explains what the following function means--y=uniform()<=0.6.
thank you!

>Oops! Thank you -
>A.F.
>
>-----Original Message-----
>From: [email protected] [mailto:[email protected]]
>Sent: Friday, December 26, 2003 5:02 PM
>To: [email protected]
>Subject: Re: st: RE: Random assignment
>
>
>I think you meant:
>
>replace y=uniform()<=`p' if y==.
>
>Dario Consonni
>
>----- Original Message -----
>From: "FEIVESON, ALAN H. (AL) (JSC-SK) (NASA)" <[email protected]>
>Date: Wednesday, December 24, 2003 10:18 pm
>Subject: st: RE: Random assignment
>
>> Here's one way - suppose your dichotomous variable is y:
>> 
>> summ y
>> local p=r(mean)  
>> replace y=uniform<=`p' if y==.
>> 
>> Al Feiveson
>> 
>> 
>> 
>> -----Original Message-----
>> From: [email protected] [mailto:[email protected]]
>> Sent: Wednesday, December 24, 2003 12:40 PM
>> To: [email protected]
>> Subject: st: Random assignment
>> 
>> 
>> I have a data set with 50 missing values for a dichotomous 
>> variable, coded 
>> 1 and 0; I would like to recode the 50 missing values to non-
>> missing, 
>> inserting 1 and 0's on a random basis proportionate to their 
>> presence in 
>> the overall data set. Any porcedure for this sort of thing in 
>> stata. 
>> Thanks.
>> 
>> *
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>> 
>
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