Re: st: finding duplicate data

[William Buchanan <william@williambuchanan.net>]

Hi,

Have you tried searching using the term duplicate? I'd suggest getting familiar with the -duplicates- command and also looking at some of the FAQs on the Stata website that show how to do this using the -cond()- or -bysort- functions. 

HTH,
Billy

Sent from my iPhone

On Nov 17, 2012, at 10:08, Mahbubeh Parsaeian <mahbobehparsaeian@yahoo.com> wrote:

> Hi everybody.
> I have problem about finding duplicate data.
> I work with a dataset which consist of household information. For every
> household, interviewers should ask only from one of the family members. Unfortunately
> in some family the interviewers asked from two or more person in a family and I
> should delete this extra part of data . 
> To clarify the problem, imagine the id number shows the household number.
> As an example the clusters consist of an id number such as 1, 2,3. I have
> explored the data and understand some id numbers have been repeated in the same
> cluster (for example 1 2 2) and it shows two or more person have been interviewed in the same
> family. I want to use one person in a family and delete the data for the second
> person.
> My personal idea is to use a function to enumerate the id variable
> within the clusters and delete extra id numbers which have been repeated. I know
> we have some function like _n which enumerate the repetition but I don’t know
> how I use this command to enumerate the repetition of id variable within
> clusters. 
> If it is possible please help me to find a good solution.  
> 
> *
> *   For searches and help try:
> *   http://www.stata.com/help.cgi?search
> *   http://www.stata.com/support/faqs/resources/statalist-faq/
> *   http://www.ats.ucla.edu/stat/stata/

*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/faqs/resources/statalist-faq/
*   http://www.ats.ucla.edu/stat/stata/