You understood perfectly what I meant.
Thanks Eva, I was stuck on it.
Stefano
-----Original message-----
From: "Eva Poen" [email protected]
Date: Fri, 02 May 2008 10:19:10 +0200
To: [email protected]
Subject: Re: st: eliminating unique values
> 008/5/2 Stefano Costalli <[email protected]>:
> > Dear statalisters,
> >
> > I have a variable with about 25.000 observations and many unique values. I need to drop the unique values, but I can't browse the whole data set to search for each unique value individually.
>
> I'm not quite I understand. Do you have one variable X in your data,
> and within X there are some duplicates, and you want to drop
> everything that is unique? In this case you can either use
>
> duplicates tag X, gen(tag)
> drop if tag==0
>
> or, equivalently,
> bysort X: gen drop = _N
> drop if drop==1
>
> Eva
> *
> * For searches and help try:
> * http://www.stata.com/support/faqs/res/findit.html
> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
