Been there myself:
http://www.stata.com/statalist/archive/2008-04/msg01278.html
-drop-ping probably requires the data to be held in memory, so unless you
can open the dataset... Still, my initial post remains valid: -use- whatever
you want to -keep- in terms of variables, and -save- under a different name
and you have effectively -drop-ped, right?
HTH
Martin
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Jos� Luis Ch�vez
Calva
Sent: Wednesday, September 24, 2008 11:10 PM
To: [email protected]
Subject: Re: st: RE: Modify large data base without opening it
Thanks for the quick response. I apologize for not making myself
clear: I want to drop the variables because I'm trying to clean the
data set. That's why I would like to know if there is a command to
drop them without opening the data set.
Thanks again,
Jos� Luis
2008/9/24 Michael I. Lichter <[email protected]>:
> Martin is of course right and I apologize for misreading the question. I
was
> thinking about my own problems with reading large datasets not yet in
Stata
> format.
>
> -ml
>
> Martin Weiss wrote:
>>
>> No need to drop anything, just load whatever you need with -use with
>> options-. See - h use-
>>
>>
>> HTH
>> Martin
>>
>>
>> -----Original Message-----
>> From: [email protected]
>> [mailto:[email protected]] On Behalf Of Jos� Luis
>> Ch�vez
>> Calva
>> Sent: Wednesday, September 24, 2008 10:18 PM
>> To: [email protected]
>> Subject: st: Modify large data base without opening it
>>
>> I'm working with a very large data base (1000m, 2000 vars) and my PC
>> is taking too long to open it. I would like to know if there is a way
>> or a specific command to drop some variables without actually opening
>> the data base.
>>
>> Thanks in advance,
>>
>> Jos� Luis Ch�vez Calva
>>
>> *
>> * For searches and help try:
>> * http://www.stata.com/help.cgi?search
>> * http://www.stata.com/support/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/statalist/faq
>> * http://www.ats.ucla.edu/stat/stata/
>>
>
> --
> Michael I. Lichter, Ph.D.
> Research Assistant Professor & NRSA Fellow
> UB Department of Family Medicine / Primary Care Research Institute
> UB Clinical Center, 462 Grider Street, Buffalo, NY 14215
> Office: CC 125 / Phone: 716-898-4751 / E-Mail: [email protected]
>
> *
> * For searches and help try:
> * http://www.stata.com/help.cgi?search
> * http://www.stata.com/support/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/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/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
