Statalist


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: st: RE: Slicing data set


From   Johannes Geyer <JGeyer@diw.de>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: RE: Slicing data set
Date   Fri, 21 Nov 2008 18:37:08 +0100

What about dropping the saved data from the large data set - if that is 
allowed in your application (no overlap between data-slices).

I mean you could do the following:

***************************
use <somedata>
preserve
keep if <somecondition>
save <sliceofsomedata>
restore
drop if <somecondition> 
preserve
...
***************************

wouldn't that increase speed because the original data set gets smaller 
and you save a last preserve?

Johannes



> No, I don't think so. But -savesome- from SSC should mean less typing
> for you. 
> 
> Nick
> n.j.cox@durham.ac.uk 
> 
> Pedro Martins
> 
> I want to save subsets of a large data set into smaller files. Since
> <save> doesn't allow for an <if> condition, I'm using a loop include
> <preserve> and <restore>. Is there a more time-efficient way of
> slicing one's data?
> 
> 
> *
> *   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/



© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index