Jianan
I do not think there is a direct command which will help you to
achieve what you would like. But, you could try the following:
unab vlist : _all
//keep 3rd to 6th variable from dataset in memory
keep `: word 3 of `vlist'' - `: word 6 of `vlist''
This will read all variable names into a local macro (vlist) and then
uses local extended functions to extract numbered elements from this
macro. For more information look at: -help unab- and -help
extended_fcn-
Regards
Sebastian
2007/10/2, Jian'an Luan <[email protected]>:
> Dear Statalist
>
> I wonder if I can select a sub-dataset by variables without given
> variable names but using variable numbers, something like the command
> when select a sub-dataset by observations ".keep if _n>1001 & _n<2000".
>
> Any help will be appreciated.
>
> Jianan
>
> *
> * 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/
